Rule2024-31513

Credit for Production of Clean Hydrogen and Energy Credit

Primary source

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Published
January 10, 2025
Effective
January 10, 2025

Issuing agencies

Treasury DepartmentInternal Revenue Service

Abstract

This document contains final regulations implementing the credit for production of clean hydrogen and certain provisions of the energy credit as enacted by the Inflation Reduction Act of 2022. The regulations provide rules for: determining lifecycle greenhouse gas emissions rates resulting from hydrogen production processes; petitioning for provisional emissions rates; verifying production and sale or use of clean hydrogen; modifying or retrofitting existing qualified clean hydrogen production facilities; using electricity from certain renewable or zero-emissions sources to produce qualified clean hydrogen; and electing to treat part of a specified clean hydrogen production facility instead as property eligible for the energy credit. These regulations affect all taxpayers who produce qualified clean hydrogen and claim the clean hydrogen production credit, elect to treat part of a specified clean hydrogen production facility as property eligible for the energy credit, or produce electricity from certain renewable or zero-emissions sources used by taxpayers or related persons to produce qualified clean hydrogen.

Full Text

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<title>Federal Register, Volume 90 Issue 6 (Friday, January 10, 2025)</title>
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[Federal Register Volume 90, Number 6 (Friday, January 10, 2025)]
[Rules and Regulations]
[Pages 2224-2329]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2024-31513]



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Vol. 90

Friday,

No. 6

January 10, 2025

Part IV





Department of the Treasury





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Internal Revenue Service





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26 CFR Part 1





Credit for Production of Clean Hydrogen and Energy Credit; Final Rule

Federal Register / Vol. 90 , No. 6 / Friday, January 10, 2025 / Rules 
and Regulations

[[Page 2224]]


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DEPARTMENT OF THE TREASURY

Internal Revenue Service

26 CFR Part 1

[TD 10023]
RIN 1545-BQ97


Credit for Production of Clean Hydrogen and Energy Credit

AGENCY: Internal Revenue Service (IRS), Treasury.

ACTION: Final regulations.

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SUMMARY: This document contains final regulations implementing the 
credit for production of clean hydrogen and certain provisions of the 
energy credit as enacted by the Inflation Reduction Act of 2022. The 
regulations provide rules for: determining lifecycle greenhouse gas 
emissions rates resulting from hydrogen production processes; 
petitioning for provisional emissions rates; verifying production and 
sale or use of clean hydrogen; modifying or retrofitting existing 
qualified clean hydrogen production facilities; using electricity from 
certain renewable or zero-emissions sources to produce qualified clean 
hydrogen; and electing to treat part of a specified clean hydrogen 
production facility instead as property eligible for the energy credit. 
These regulations affect all taxpayers who produce qualified clean 
hydrogen and claim the clean hydrogen production credit, elect to treat 
part of a specified clean hydrogen production facility as property 
eligible for the energy credit, or produce electricity from certain 
renewable or zero-emissions sources used by taxpayers or related 
persons to produce qualified clean hydrogen.

DATES: 
    Effective date: These regulations are effective January 10, 2025.
    Applicability dates: For dates of applicability, see Sec. Sec.  
1.45V-1(d), 1.45V-2(d), 1.45V-4(g), 1.45V-5(l), 1.45V-6(d), and 1.48-
15(h).

FOR FURTHER INFORMATION CONTACT: Courtney Hutson at (202) 317-5319 or 
Alan Tilley at (202) 317-6512 (not toll-free numbers).

SUPPLEMENTARY INFORMATION: 

Authority

    This document contains final regulations that amend the Income Tax 
Regulations (26 CFR part 1) by adding regulations authorized to be 
issued by the Secretary of the Treasury or her delegate (Secretary) 
under sections 48 and 45V of the Internal Revenue Code (Code). The 
final regulations are issued under the authority granted under sections 
45V(c)(1)(B), 45V(e)(5), 45V(f), 48(a)(15)(C), 48(a)(15)(E), 48(a)(16), 
6001, and 7805(a) of the Code.
    Section 45V(c)(1)(B) provides that lifecycle greenhouse gas 
emissions (lifecycle GHG emissions) shall only include emissions 
through the point of production (well-to-gate), as determined under the 
most recent Greenhouse gases, Regulated Emissions, and Energy use in 
Transportation model (commonly referred to as the ``GREET model'') 
developed by Argonne National Laboratory, or a successor model (as 
determined by the Secretary).
    Section 45V(e)(5) directs the Secretary to issue regulations and 
guidance as she determines to be necessary to carry out the purposes of 
section 45V(e), which relates to the increased credit amount for 
qualified clean hydrogen production facilities that satisfy certain 
prevailing wage and apprenticeship requirements.
    Further, section 45V(f) directs the Secretary to issue regulations 
or other guidance to carry out the purposes of section 45V, including 
for determining lifecycle GHG emissions.
    Section 48(a)(15)(C) provides that the term ``specified clean 
hydrogen production facility'' means any qualified clean hydrogen 
production facility (as defined in section 45V(c)(3))(i) that is placed 
in service after December 31, 2022, (ii) with respect to which (I) no 
section 45V credit or section 45Q credit has been allowed, and (II) the 
taxpayer makes an irrevocable election to have section 48(a)(15) apply, 
and (iii) for which an unrelated third party has verified (in such form 
or manner as the Secretary may prescribe) that such facility produces 
hydrogen through a process that results in lifecycle GHG emissions that 
are consistent with the hydrogen that such facility was designed and 
expected to produce under section 48(a)(15)(A)(ii).
    Section 48(a)(15)(E) directs the Secretary to issue such 
regulations or other guidance as she determines necessary to carry out 
the purposes of the section 48 energy credit, including regulations or 
guidance related to the recapture of such credit that exceeds the 
allowed amount ``if the expected production were consistent with the 
actual verified production (or all of the credit so allowed in the 
absence of such verification).''
    Section 48(a)(16) directs the Secretary to issue regulations or 
other guidance as she determines necessary to carry out the purposes of 
the section 48 energy credit, including for recordkeeping or 
information reporting requirements necessary for the administration of 
the credit.
    Section 6001 provides an express delegation of authority to the 
Secretary, stating that, ``[e]very person liable for any tax imposed by 
this title, or for the collection thereof, shall keep such records, 
render such statements, make such returns, and comply with such rules 
and regulations as the Secretary may from time to time prescribe. 
Whenever in the judgment of the Secretary it is necessary, [s]he may 
require any person, by notice served upon such person or by 
regulations, to make such returns, render such statements, or keep such 
records, as the Secretary deems sufficient to show whether or not such 
person is liable for tax under this title.''
    These regulations are also issued under the express delegation of 
authority under section 7805(a), which provides that ``[t]he Secretary 
shall prescribe all needful rules and regulations for the enforcement 
of [the Code], including all rules and regulations as may be necessary 
by reason of any alteration of law in relation to internal revenue.''

Background

    This document contains final regulations to implement the statutory 
provisions of sections 45V and 48(a)(15) of the Code, as enacted by 
section 13204 of Public Law 117-169, 136 Stat. 1818, 1935 (August 16, 
2022), commonly known as the Inflation Reduction Act of 2022 (IRA).
    The IRA added several provisions to the Code related to the 
production of, and investment in, clean hydrogen, which, along with the 
provisions of sections 45V and 48(a)(15), are described in part I of 
this Background section. Part II of this Background section describes a 
previous request for public comment on these provisions, and part III 
describes the proposed regulations promulgated under these provisions 
that the final regulations in this document adopt or modify as 
explained in the Summary of Comments and Explanation of Revisions.

I. IRA Provisions for Clean Hydrogen Production and Investment

    This part I describes the credit for production of clean hydrogen 
as determined under section 45V (section 45V credit) and the 
irrevocable election to claim an energy credit under section 48 
(section 48 credit) in lieu of the section 45V credit. Also described 
are statutory exceptions to the requirement that electricity be sold to 
an unrelated person to be eligible for the renewable electricity 
production credit determined

[[Page 2225]]

under section 45 (section 45 credit) or the zero-emission nuclear power 
production credit determined under section 45U (section 45U credit). 
Under these exceptions, electricity produced by a taxpayer from a 
qualified facility under section 45(d) or a qualified nuclear power 
facility under section 45U(b)(1) may be treated as sold by the taxpayer 
to an unrelated person during the taxable year if the electricity is 
used by the taxpayer or a related person at a qualified clean hydrogen 
production facility to produce qualified clean hydrogen.

A. Section 45V

1. Amount of Credit
    Section 45V provides an income tax credit for the production of 
qualified clean hydrogen. For purposes of section 38, section 45V(a) 
provides that the clean hydrogen production credit for any taxable year 
is an amount equal to the product of (i) the kilograms of qualified 
clean hydrogen produced by the taxpayer during such taxable year at a 
qualified clean hydrogen production facility during the 10-year period 
beginning on the date such facility was originally placed in service, 
and (ii) the applicable amount as determined under section 45V(b) with 
respect to such hydrogen.
    Section 45V(b)(1) provides that, for purposes of section 45V(a)(2), 
the applicable amount is an amount equal to the applicable percentage 
of $0.60. If the amount so determined is not a multiple of 0.1 cent, 
then such amount is rounded to the nearest multiple of 0.1 cent.
    Section 45V(b)(2) provides that, for purposes of section 45V(b)(1), 
the applicable percentage is determined based on the lifecycle GHG 
emissions rate of the process used to produce any qualified clean 
hydrogen as follows: (i) if the lifecycle GHG emissions rate is not 
greater than 4 kilograms of carbon dioxide equivalent (CO2e) per 
kilogram of hydrogen, and not less than 2.5 kilograms of CO2e per 
kilogram of hydrogen, then the applicable percentage is 20 percent; 
(ii) if the lifecycle GHG emissions rate is less than 2.5 kilograms of 
CO2e per kilogram of hydrogen, and not less than 1.5 kilograms of CO2e 
per kilogram of hydrogen, then the applicable percentage is 25 percent; 
(iii) if the lifecycle GHG emissions rate is less than 1.5 kilograms of 
CO2e per kilogram of hydrogen, and not less than 0.45 kilograms of CO2e 
per kilogram of hydrogen, then the applicable percentage is 33.4 
percent; and (iv) if the lifecycle GHG emissions rate is less than 0.45 
kilograms of CO2e per kilogram of hydrogen, then the applicable 
percentage is 100 percent.
    Section 45V(b)(3) provides that the $0.60 amount in section 
45V(b)(1) is adjusted by multiplying such amount by the inflation 
adjustment factor (as determined under section 45(e)(2), determined by 
substituting ``2022'' for ``1992'' in section 45(e)(2)(B)) for the 
calendar year in which the qualified clean hydrogen is produced. If any 
amount as increased under section 45V(b)(3) is not a multiple of 0.1 
cent, such amount is rounded to the nearest multiple of 0.1 cent.\1\
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    \1\ The IRS will publish the inflation-adjusted section 45V 
applicable amount annually. The section 45V applicable amounts for 
calendar years 2023 and 2024 were published in Notice 2024-45, 2024-
26 I.R.B. 1747.
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    Section 45V(e)(1) provides that, in the case of any qualified clean 
hydrogen production facility that satisfies the requirements of section 
45V(e)(2), the amount of the section 45V credit with respect to 
qualified clean hydrogen described in section 45V(b)(2) is equal to the 
amount determined under section 45V(a) (determined without regard to 
section 45V(e)(1)) multiplied by five.
    A qualified clean hydrogen production facility meets the 
requirements of section 45V(e)(2) if: (i) the facility began 
construction before January 29, 2023, and with respect to any taxable 
year, for any portion of such taxable year that is within the 10-year 
period beginning on the date the facility is originally placed in 
service, the prevailing wage requirements of section 45V(e)(3)(A) are 
met for any alteration or repair of the facility that occurs after 
January 29, 2023 (to the extent applicable); \2\ or (ii) the facility 
satisfies the prevailing wage and apprenticeship (PWA) requirements of 
section 45V(e)(3)(A) and (4).\3\
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    \2\ Section 45V(e)(3)(A)(ii) requires the payment of wages at 
prevailing rates ``with respect to any taxable year, for any portion 
of such taxable year which is within the period described in 
subsection (a)(2)'', with respect to the alteration or repair of the 
facility. There is no ``period described in subsection (a)(2).'' The 
Treasury Department and the IRS interpret the reference to 
``subsection (a)(2)'' as a reference to section 45V(a)(1) where the 
10-year credit period is identified.
    \3\ See Sec. Sec.  1.45-7, 1.45-8, 1.45-12, and 1.45V-3, as 
published in the Federal Register (89 FR 53184) on June 25, 2024.
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    Generally, the prevailing wage requirements under section 
45V(e)(3)(A) with respect to any qualified clean hydrogen production 
facility require the taxpayer to ensure that any laborers and mechanics 
employed by the taxpayer or by any contractor or subcontractor in (i) 
the construction of such facility, and (ii) with respect to any taxable 
year, for any portion of such taxable year that is within the 10-year 
period beginning on the date such facility was originally placed in 
service, the alteration or repair of such facility, are paid wages at 
rates not less than the prevailing rates for construction, alteration, 
or repair of a similar character in the locality in which such facility 
is located as most recently determined by the Secretary of Labor, in 
accordance with subchapter IV of chapter 31 of title 40 of the United 
States Code, commonly known as the Davis-Bacon Act. Correction and 
penalty rules similar to the rules of section 45(b)(7)(B) also apply.
    Section 45V(e)(4) provides that rules similar to the apprenticeship 
requirements of section 45(b)(8) apply for purposes of section 
45V(e)(2)(B).\4\
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    \4\ Under Sec.  1.45V-3, the PWA requirements for purposes of 
section 45V(e)(2)(B) are satisfied if a facility meets the 
prevailing wage requirements of section 45(b)(7) and Sec.  1.45-7, 
the apprenticeship requirements of section 45(b)(8) and Sec.  1.45-
8, and the recordkeeping and reporting requirements of Sec.  1.45-
12. Those regulations are not a part of this Treasury decision and 
Sec.  1.45V-3 is addressed only to the extent necessary for purposes 
of formatting the final regulations that are the subject of this 
decision in accordance with CFR standards.
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    For purposes of section 45V(a), in the case of a qualified clean 
hydrogen production facility that does not satisfy the requirements of 
section 45V(e)(2), the amount of the clean hydrogen production credit 
for any taxable year is $0.12, $0.15, $0.20, or $0.60 per kilogram of 
qualified clean hydrogen produced (before taking into account any 
inflation adjustment under section 45V(b)(3)), depending on the 
lifecycle GHG emissions rate associated with the facility's hydrogen 
production process. For facilities meeting the requirements of section 
45V(e)(2), the credit amount determined under section 45V(a) (as 
adjusted for inflation subject to section 45V(b)(3)) is multiplied by 
five.
2. Definitions
a. Lifecycle Greenhouse Gas Emissions
    Section 45V(c)(1)(A) provides that, subject to section 
45V(c)(1)(B), the term ``lifecycle greenhouse gas emissions'' has the 
same meaning given such term under section 211(o)(1)(H) of the Clean 
Air Act (42 U.S.C. 7545(o)(1)(H)), as in effect on August 16, 2022. 
Under section 45V(c)(1)(B), the term ``lifecycle greenhouse gas 
emissions'' includes emissions only through the point of production 
(well-to-gate), as determined under the most recent Greenhouse gases, 
Regulated Emissions, and Energy use in Transportation model, referred 
to as the ``GREET model'' commonly and in this document, developed by 
Argonne National Laboratory, or a successor model as determined by the 
Secretary.

[[Page 2226]]

b. Qualified Clean Hydrogen
    Section 45V(c)(2)(A) provides that the term ``qualified clean 
hydrogen'' means hydrogen that is produced through a process that 
results in a lifecycle GHG emissions rate of not greater than 4 
kilograms of CO2e per kilogram of hydrogen. Section 45V(c)(2)(B) 
further provides that the term ``qualified clean hydrogen'' does not 
include any hydrogen unless (i) such hydrogen is produced (A) in the 
United States (as defined in section 638(1) of the Code) or a United 
States territory (having the meaning of the term ``possession'' as 
defined in section 638(2)), (B) in the ordinary course of a trade or 
business of the taxpayer, and (C) for sale or use; and (ii) the 
production and sale or use of such hydrogen is verified by an unrelated 
party.
c. Provisional Emissions Rate
    Section 45V(c)(2)(C) provides that, in the case of any hydrogen for 
which a lifecycle GHG emissions rate has not been determined for 
purposes of section 45V, a taxpayer producing such hydrogen may file a 
petition with the Secretary for a determination of the lifecycle GHG 
emissions rate with respect to such hydrogen, referred to as a 
``provisional emissions rate'' or PER.
d. Qualified Clean Hydrogen Production Facility
    Section 45V(c)(3) provides that the term ``qualified clean hydrogen 
production facility'' means a facility (i) owned by the taxpayer, (ii) 
that produces qualified clean hydrogen, and (iii) the construction of 
which begins before January 1, 2033.\5\
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    \5\ Section 45V does not specify an earliest date on which a 
qualified clean hydrogen production facility must begin construction 
or be placed in service to be eligible for the section 45V credit. 
However, the section 45V credit is available for qualified clean 
hydrogen produced after December 31, 2022. See Sec.  13204(a)(5)(A) 
of the IRA. Thus, the owner of a qualified clean hydrogen production 
facility originally placed in service after December 31, 2012, could 
claim the section 45V credit for qualified clean hydrogen produced 
during at least some portion of the 10-year period described in 
section 45V(a)(1), provided all other requirements are met.
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3. Special Rules
a. Treatment of Facilities Owned by More Than One Taxpayer
    Section 45V(d)(1) provides that rules similar to the rules of 
section 45(e)(3) apply for purposes of section 45V. Section 45(e)(3) 
provides that, in the case of a facility in which more than one person 
has an ownership interest, except to the extent provided in regulations 
prescribed by the Secretary, production from the facility is allocated 
among such persons in proportion to their respective ownership 
interests in the gross sales from such facility.
b. Coordination With Section 45Q
    Section 45V(d)(2) provides that no section 45V credit is allowed 
with respect to any qualified clean hydrogen produced at a facility 
that includes carbon capture equipment for which a credit is allowed to 
any taxpayer under section 45Q (section 45Q credit) for the taxable 
year or any prior taxable year.
c. Credit Reduced for Tax-Exempt Bonds
    Section 45V(d)(3) provides that rules similar to the rules under 
section 45(b)(3) (credit reduced for tax-exempt bonds) apply for 
purposes of section 45V. Section 45V(d)(3) is effective for facilities 
that begin construction after August 16, 2022. See Sec.  13204(a)(5)(B) 
of the IRA. Section 45(b)(3) provides that the amount of the credit 
determined under section 45(a) with respect to any facility for any 
taxable year (determined after the application of section 45(b)(1) and 
(2) regarding phaseout and inflation adjustment rules) is reduced by 
the amount that is the product of the amount so determined for such 
year and the lesser of 15 percent or a fraction (A) the numerator of 
which is the sum, for the taxable year and all prior taxable years, of 
proceeds of an issue of any obligations the interest on which is exempt 
from tax under section 103 and that is used to provide financing for 
the qualified facility, and (B) the denominator of which is the 
aggregate amount of additions to the capital account for the qualified 
facility for the taxable year and all prior taxable years. Section 
45(b)(3) further provides that the amounts determined under section 
45(b)(3) for any taxable year are determined as of the close of the 
taxable year.
d. Modification of Existing Facilities
    Section 45V(d)(4) provides that for purposes of section 45V(a)(1), 
in the case of any facility that (A) was originally placed in service 
before January 1, 2023, and, prior to the modification described in 
section 45V(d)(4)(B), did not produce qualified clean hydrogen, and (B) 
after the date such facility was originally placed in service (i) is 
modified to produce qualified clean hydrogen, and (ii) amounts paid or 
incurred with respect to such modification are properly chargeable to 
the capital account of the taxpayer, such facility is deemed to have 
been originally placed in service as of the date the property required 
to complete the modification described in section 45V(d)(4)(B) is 
placed in service. Section 45V(d)(4) is effective for modifications 
made after December 31, 2022. See Sec.  13204(a)(5)(C) of the IRA.

B. Electricity Used at a Qualified Clean Hydrogen Production Facility

    Section 45(e)(13) provides that electricity produced by the 
taxpayer is treated as sold by such taxpayer to an unrelated person 
during the taxable year if (i) such electricity is used during such 
taxable year by the taxpayer or a person related to the taxpayer at a 
qualified clean hydrogen production facility (as defined in section 
45V(c)(3)) to produce qualified clean hydrogen (as defined in section 
45V(c)(2)); and (ii) such use and production is verified (in such form 
or manner as the Secretary may prescribe) by an unrelated third party. 
Section 45(e)(13) is effective for electricity produced after December 
31, 2022. See Sec.  13204(b)(3) of the IRA.
    Section 45U(c)(2) provides that rules similar to the rules of 
section 45(e)(13) apply for purposes of section 45U. Generally, section 
45U is effective for electricity produced at a qualified nuclear power 
facility and sold after December 31, 2023, in taxable years beginning 
after that date.

C. Election To Treat Clean Hydrogen Production Facilities as Energy 
Property

    Section 48(a)(15)(A)(i) provides that, in the case of any qualified 
property (as defined in section 48(a)(5)(D)) that is part of a 
specified clean hydrogen production facility, such property is treated 
as energy property. Section 48(a)(15)(A)(ii) provides that the energy 
percentage of the basis of any qualified property that is treated as 
energy property is, for a facility that is designed and reasonably 
expected to produce qualified clean hydrogen with a lifecycle GHG 
emissions rate that is: (i) not greater than 4 kilograms of CO2e per 
kilogram of hydrogen, and not less than 2.5 kilograms of CO2e per 
kilogram of hydrogen, 1.2 percent; (ii) less than 2.5 kilograms of CO2e 
per kilogram of hydrogen, and not less than 1.5 kilograms of CO2e per 
kilogram of hydrogen, 1.5 percent; (iii) less than 1.5 kilograms of 
CO2e per kilogram of hydrogen, and not less than 0.45 kilograms of CO2e 
per kilogram of hydrogen, 2 percent; and (iv) less than 0.45 kilograms 
of CO2e per kilogram of hydrogen, 6 percent. Under section 48(a)(9), 
the amount of the section 48 credit determined for a specified clean 
hydrogen production facility under section 48(a)(15) is multiplied by 
five if the facility meets the requirements of section 48(a)(9)(B) 
(regarding application of certain maximum net

[[Page 2227]]

output levels of electrical or thermal energy or prevailing wage and 
apprenticeship requirements). However, the domestic content and energy 
communities bonuses under section 48(a)(12) and (14) do not apply to a 
specified clean hydrogen production facility.
    Section 48(a)(15) is effective for property placed in service after 
December 31, 2022, and for any property the construction of which began 
before January 1, 2023, only to the extent of the basis thereof 
attributable to construction, reconstruction, or erection after 
December 31, 2022. See Sec.  13204(c)(3) of the IRA.
1. Denial of Production Credit
    Section 48(a)(15)(B) provides that no section 45V credit or section 
45Q credit is allowed for any taxable year with respect to any 
specified clean hydrogen production facility or any carbon capture 
equipment included at such facility.
2. Specified Clean Hydrogen Production Facility
    Section 48(a)(15)(C) provides that the term ``specified clean 
hydrogen production facility'' means any qualified clean hydrogen 
production facility (as defined in section 45V(c)(3)) (i) that is 
placed in service after December 31, 2022, (ii) with respect to which 
(I) no section 45V credit or section 45Q credit has been allowed, and 
(II) the taxpayer makes an irrevocable election to have section 
48(a)(15) apply, and (iii) for which an unrelated third party has 
verified (in such form or manner as the Secretary may prescribe) that 
such facility produces hydrogen through a process that results in 
lifecycle GHG emissions that are consistent with the hydrogen that such 
facility was designed and expected to produce under section 
48(a)(15)(A)(ii).
3. Qualified Clean Hydrogen
    Section 48(a)(15)(D) provides that, for purposes of section 
48(a)(15), the term ``qualified clean hydrogen'' has the meaning given 
such term by section 45V(c)(2).
4. Regulations
    Section 48(a)(15)(E) requires the Secretary to issue regulations or 
other guidance as she determines necessary to carry out the purposes of 
section 48, including regulations or other guidance that recaptures so 
much of any section 48 credit allowed as exceeds the amount of the 
credit that would have been allowed if the expected production were 
consistent with the actual verified production (or all of the credit so 
allowed in the absence of verification).

II. Notice 2022-58

    On November 3, 2022, the Department of the Treasury (Treasury 
Department) and the IRS published Notice 2022-58, 2022-47 I.R.B. 483. 
The notice requested general comments on issues arising under section 
45V and the associated clean hydrogen production and investment 
incentives in sections 45 and 48. The notice also requested specific 
comments concerning (i) definitions; (ii) boundaries of the well-to-
gate analysis for determining the lifecycle GHG emissions rate; (iii) 
the PER process; (iv) recordkeeping and reporting; (v) verification by 
unrelated parties; and (vi) coordination with sections 45, 48, and 45Q. 
Stakeholders submitted more than 200 comments in response to Notice 
2022-58, and those comments informed the development of the proposed 
regulations.

III. Proposed Regulations

    On December 26, 2023, the Treasury Department and the IRS published 
proposed regulations under sections 45V and 48(a)(15) (REG-117631-23) 
in the Federal Register (88 FR 89220) to provide guidance on the credit 
for production of clean hydrogen and the energy credit, respectively 
(proposed regulations). The provisions of the proposed regulations are 
explained in greater detail in the preamble to the proposed 
regulations.
    On April 11, 2024, the Treasury Department and the IRS published a 
supplemental notice of proposed rulemaking under sections 45V and 
48(a)(15) in the Federal Register (89 FR 25551) inviting comments on 
the U.S. Department of Energy's (DOE) information collection related to 
the DOE's Emissions Value Request Process (EVRP) for use by applicants 
in obtaining an emissions value in support of a petition for a PER, as 
set forth in the proposed regulations. The EVRP is explained in greater 
detail in the supplemental notice of proposed rulemaking. On September 
30, 2024, the DOE announced the opening of the EVRP. See Notice of 
Availability of the 45V Emissions Value Request Process (89 FR 80898).
Summary of Comments and Explanation of Revisions
    This Summary of Comments and Explanation of Revisions summarizes 
the proposed regulations and all the substantive comments submitted in 
response to the proposed regulations. The Treasury Department and the 
IRS received approximately 30,000 written comments in response to the 
proposed regulations. The comments are available for public inspection 
at <a href="http://www.regulations.gov">www.regulations.gov</a> or upon request. A hearing was conducted in 
person and telephonically on March 25, 26, and 27, 2024, during which 
approximately 100 individuals testified.\6\ After full consideration of 
the hearing testimony and the comments received, these final 
regulations adopt the proposed regulations with modifications in 
response to the comments described in this Summary of Comments and 
Explanation of Revisions.
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    \6\ A comment requested that the Treasury Department and the IRS 
(1) hold additional public hearings in, at a minimum, each of the 
seven regions where hydrogen hubs have been proposed; (2) provide 
virtual options for attending and presenting; and (3) clarify the 
process for participation at the public hearing. The Treasury 
Department and the IRS held a hearing over three days, which 
provided the public an opportunity to present testimony either in 
person or over the telephone. Individuals, whether testifying or 
not, could attend the hearing either in person or by telephone. 
Notice of the hearing was published as part of the proposed 
regulations in the Federal Register on December 26, 2023, which 
provided details to the public on how to participate. Accordingly, 
the public was provided a meaningful opportunity to participate in 
the hearing process.
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    The Treasury Department and the IRS also consulted extensively with 
scientific and technical experts from across the Federal government, 
including personnel from the DOE and the U.S. Environmental Protection 
Agency (EPA), in developing and drafting these final regulations. The 
Treasury Department and the IRS had regular meetings with these experts 
from the time that sections 45V and 48(a)(15) were enacted through the 
drafting and publication of the proposed regulations and the final 
regulations. The conclusions reached in these final regulations and 
explained in this Summary of Comments and Explanation of Revisions were 
deeply informed by the scientific and technical expertise that was 
shared by these experts.
    Comments merely summarizing the proposed regulations, expressing 
generic, non-specific, or extraneous concerns, recommending statutory 
revisions to sections 45V, 48(a)(15), or other statutes, or addressing 
issues that do not pertain to the purposes of sections 45V and 
48(a)(15) are not applicable to this rulemaking and are not adopted. 
Additionally, except to the extent discussed in this Summary of 
Comments and Explanation of Revisions, comments addressing the features 
of 45VH2-GREET or the contents of any supporting documentation to be 
provided in seeking an emissions value from the DOE are outside the 
scope of this

[[Page 2228]]

rulemaking and therefore are not addressed herein.

I. General Rules and Definitions

    Proposed Sec.  1.45V-1 provided definitions of key terms used in 
proposed Sec. Sec.  1.45V-1 through 1.45V-6 and 1.48-15, to determine 
eligibility for, and the amount of, the section 45V credit for 
production of clean hydrogen. Comments addressed several of the 
proposed definitions, as described in this part I.A of the Summary of 
Comments and Explanation of Revisions.
    In addition, these final regulations add the new terms ``hydrogen 
gas stream,'' ``mixed gas or impurity,'' and ``productive use,'' which 
are discussed in part I.A.5 of the Summary of Comments and Explanation 
of Revisions, as well as the terms ``process'' and ``primary 
feedstock,'' which are discussed in part I.A.7. With respect to the 
definition of ``lifecycle GHG Emissions,'' the final regulations add a 
new rule for certain emissions related to purification treated as 
through the point of production, which is discussed in part I.A.6.d of 
the Summary of Comments and Explanation of Revisions. The final 
regulations renumber the definitions to incorporate the added 
definitions.

A. Definitions

1. Applicable Amount
    Section 45V(b)(1) defines applicable amount, and section 45V(b)(3) 
provides the inflation adjustment that applies when calculating the 
applicable amount. Proposed Sec.  1.45V-1(a)(2) would have adopted this 
definition and its related inflation adjustment provision. No comments 
addressed these provisions, and these final regulations adopt them as 
proposed.
2. Applicable Percentage
    Section 45V(b)(2) defines the term ``applicable percentage.'' 
Proposed Sec.  1.45V-1(a)(3) adopted this definition. No comments 
addressed this provision, and these final regulations adopt the 
definition as proposed.
3. Claim
    Proposed Sec.  1.45V-1(a)(4) would have provided that, with respect 
to the section 45V credit determined for qualified clean hydrogen 
produced by the taxpayer at a qualified clean hydrogen production 
facility, the term ``claim'' means the filing of a completed Form 7210, 
Clean Hydrogen Production Credit, or any successor form(s), with the 
taxpayer's Federal income tax return or annual information return for 
the taxable year in which the credit is determined, and includes the 
making of an election under section 6417 or section 6418 and the 
regulations thereunder, with respect to such section 45V credit on the 
applicable entity's or eligible taxpayer's timely filed (including 
extensions) Federal income tax return or annual information return.
    One comment requested that the final regulations offer a 
streamlined process to claim the section 45V credit for small producers 
of hydrogen. Section 45V does not make any distinction based on the 
size of the hydrogen producer, and the importance of reporting and 
compliance are the same regardless of the producer's size. Accordingly, 
providing a more streamlined process for claiming the section 45V 
credit for small producers is not appropriate. Additionally, to 
clarify, section 1.45V-1(a)(4) has no effect on the procedures for 
making an election under section 6417 or 6418, the requirements for 
which are described in the regulations for each provision. For 
procedures for making an election under section 6417, see Sec.  1.6417-
2(b). For procedures for making an election under section 6418, see 
Sec.  1.6418-2. Accordingly, section 1.45V-1(a)(4) is adopted without 
change.
4. Facility
a. Equipment Included in the Definition of Facility
    Proposed Sec.  1.45V-1(a)(7)(i) would have provided that, for 
purposes of the definition of qualified clean hydrogen production 
facility provided at section 45V(c)(3), the term ``facility'' means a 
single production line that is used to produce qualified clean 
hydrogen, unless otherwise specified. Further, proposed Sec.  1.45V-
1(a)(7)(i) would have provided that a ``single production line'' 
includes all components of property that function interdependently to 
produce qualified clean hydrogen. Components of property would be 
functionally interdependent if the placing in service of each component 
were dependent upon the placing in service of each of the other 
components to produce qualified clean hydrogen. Proposed Sec.  1.45V-
1(a)(7)(iii) would have provided that components that have a purpose in 
addition to the production of qualified clean hydrogen may be part of a 
facility if such components function interdependently with other 
components to produce qualified clean hydrogen. Proposed Sec.  1.45V-
1(a)(7)(iv) would have provided an example to illustrate the definition 
of facility for purposes of section 45V.
    Comments asked a variety of questions about the definition of 
``facility,'' including whether specific equipment is part of a 
facility. Some comments requested clarification on the meaning of 
``single production line'' and ``functional interdependence'' and 
whether components of a facility that produce hydrogen as a by-product 
of another production process are part of a ``single production line'' 
that is used to produce hydrogen. Other comments asked for 
clarification on whether designated spaces and equipment necessary for 
commercial operation, but not necessary for hydrogen production (for 
example, break rooms and lighting) are part of the ``facility.'' 
Another comment requested that the final regulations specify a method 
for allocating lifecycle GHG emissions across multipurpose components. 
The comment suggested that, in many cases, it would not be appropriate 
to include, through the point of production, all lifecycle GHG 
emissions from multipurpose components that are part of the balance of 
plant, such as the cooling tower or air compressor if the hydrogen 
production process does not consume a significant amount of energy from 
the use of such equipment.
    One comment recommended that the final rules modify the definition 
of ``facility'' to include all electrolyzers within the balance of 
plant to prevent hydrogen producers from designating one electrolyzer 
as having produced hydrogen without energy attribute certificates 
(EACs) should a producer not have EACs sufficient to ensure all 
hydrogen produced at a facility is qualified clean hydrogen.
    Another comment asked whether the definition of ``facility'' in 
proposed Sec.  1.45V-1(a)(7) would create a ``circular loop'' wherein 
the hydrogen producer would need to identify the components of the 
facility in order to obtain an emissions rate under 45VH2-GREET, but 
could not identify the components of the facility without knowing 
whether the facility produces hydrogen at an emissions rate of not 
greater than 4 kilograms of CO2e per kilogram of hydrogen.
    One comment requested clarification that the definition of facility 
in proposed Sec.  1.45V-1(a)(7) does not apply for purposes of the 
definition of ``industrial facility'' in Sec.  1.45Q-2(d).
    One comment requested clarification on whether a facility includes 
downstream property that uses the hydrogen produced at a qualified 
clean hydrogen production facility. Similarly, one comment requested 
clarification on whether hydrogen production equipment that is 
installed on the property of an industrial plant or a gas utility 
qualifies as a ``facility.'' Although

[[Page 2229]]

unclear, this comment appears to be requesting clarification whether an 
existing industrial plant or gas utility becomes a hydrogen production 
facility if hydrogen production equipment is added to the existing 
plant or utility.
    In response to these comments seeking clarification on what is 
included in the definition of facility, these final regulations modify 
proposed Sec.  1.45V-1(a)(7)(i) and (iv), as well as Sec.  1.45V-
1(a)(7)(ii), which identifies equipment that is not included in the 
definition of facility. Generally, the definition of ``facility'' is 
sufficiently clear as an established tax concept. The concept of 
``functional interdependence'' has been used by courts for many years 
to decide whether property was placed in service for depreciation and 
the investment tax credit. See, for example, Armstrong World 
Industries, Inc. v. Commissioner, 974 F.2d 422, 434 (3d Cir. 1992) 
(``[C]ourts appear to agree that individual components will be 
considered as a single property for tax purposes--when the component 
parts are functionally interdependent when each component is essential 
to the operation of the project as a whole and cannot be used 
separately to any effect.''). The general definition of facility in 
proposed Sec.  1.45V-1(a)(7)(i) uses this ``functional 
interdependence'' concept by indicating that a single production line 
includes all components of property that function interdependently to 
produce qualified clean hydrogen. To ease the determination of what 
equipment is included, the final regulations add to this definition the 
phrase ``through a process that results in the lifecycle GHG emissions 
rate used to determine the credit.'' This clarifies that all equipment 
used to produce the qualified clean hydrogen for which the section 45V 
credit is determined is included as part of the qualified clean 
hydrogen facility. For example, carbon capture equipment is part of the 
facility if it contributes to the lifecycle GHG emissions rate of the 
process by which the qualified clean hydrogen for which the credit is 
determined is produced. In addition, these final regulations update the 
example in Sec.  1.45V-1(a)(7)(iv) to reflect the modifications made to 
the text in Sec.  1.45V-1(a)(7)(i).
    Purification equipment is part of the facility if such equipment 
contributes to the purity content of the qualified clean hydrogen for 
which the section 45V credit is determined. As discussed in part 
I.A.6.c of this Summary of Comments and Explanation of Revisions, 
purification equipment that is used downstream of the facility's 
process of producing qualified clean hydrogen is not part of the 
facility, but in certain circumstances, emissions from such 
purification equipment are within the well-to-gate system boundary for 
purposes of the lifecycle GHG emissions rate analysis.
    Regarding multipurpose components, these final regulations adopt 
proposed Sec.  1.45V-1(a)(7)(iii) with a clarification that production 
is for qualified clean hydrogen. Proposed Sec.  1.45V-1(a)(7)(iii) 
already clarifies that components can have multiple purposes, including 
but not limited to the production of qualified clean hydrogen, so long 
as the components function interdependently with other components to 
produce qualified clean hydrogen. With respect to the allocation of 
lifecycle GHG emissions attributed to multipurpose components, 
taxpayers must use a reasonable method to allocate the inputs used to 
determine such emissions.
    To the extent a facility produces hydrogen as a by-product of 
another production process, any components of the facility that 
function interdependently to produce qualified clean hydrogen--
regardless of whether they serve a purpose in addition to the 
production of qualified clean hydrogen--are part of the qualified clean 
hydrogen production facility.
    With respect to whether equipment necessary for commercial 
operation, but not for hydrogen production, is part of the ``facility'' 
(such as break room lighting), Sec.  1.45V-1(a)(7)(i) answers this 
question. If the placing in service of such equipment is not necessary 
to produce qualified clean hydrogen and is not part of the process that 
results in the lifecycle GHG emissions rate used to determine the 
credit, such equipment does not function interdependently with the 
qualified clean hydrogen production equipment and is not part of the 
``facility.'' If such non-functionally interdependent equipment draws 
from the same electricity source as the facility, to the extent it is 
separately metered, such electricity usage would not be an input into 
45VH2-GREET. To the extent such equipment is not separately metered, 
taxpayers must use a reasonable method to allocate such electricity 
usage.
    The final regulations do not adopt the comment to revise the 
definition of ``facility'' to include all electrolyzers within the 
balance of plant. Under Sec.  1.45V-1(a)(7)(i), to the extent each 
electrolyzer produces qualified clean hydrogen separately from the 
other electrolyzers (that is, does not function interdependently with 
the other electrolyzers), each electrolyzer is treated as a separate 
facility. Treating each electrolyzer within the balance of plant as a 
separate facility is consistent with Revenue Ruling 94-31, 1994-1 C.B. 
16, which held that each wind turbine within a windfarm is a separate 
``qualified facility'' under section 45 because each wind turbine can 
be separately operated and metered to produce electricity. Similar to a 
wind turbine within a wind farm, an electrolyzer within the balance of 
plant functions separately from the other electrolyzers to produce 
hydrogen. As to the concern that EACs may be shifted from one 
electrolyzer to another electrolyzer within the balance of plant, a 
hydrogen producer is free to acquire and retire EACs for some 
electrolyzers and not for others, no matter the production technology 
the electrolyzers use and no matter the extent of their co-location, so 
long as the retired EACs are matched to a particular electrolyzer's 
electricity consumption from which hydrogen is produced. Imposing a 
rule that co-located electrolyzers are considered part of the same 
facility so that they each receive an equal allocation of EACs would 
not necessarily reflect each electrolyzer's electricity consumption and 
would be inconsistent with existing tax law's treatment of the 
definition of ``facility.''
    In response to the comment that questioned whether the definition 
of ``facility'' in Sec.  1.45V-1(a)(7) creates a ``circular loop,'' 
these final regulations modify proposed Sec.  1.45V-1(a)(7)(i) to 
provide that equipment is part of the facility if it functions 
interdependently to produce qualified clean hydrogen through a process 
that results in the lifecycle GHG emissions rate used to determine the 
credit. The lifecycle GHG emissions analysis of the hydrogen production 
process is not coextensive with the tax definition of a hydrogen 
production facility. For example, lifecycle GHG emissions include 
emissions from stages of the hydrogen production process beyond the 
hydrogen production facility, such as emissions from growth, gathering, 
extraction, processing, and delivery of feedstock to a hydrogen 
production facility. See section 45V(c)(1)(A) (defining lifecycle GHG 
emissions by reference to section 211(o)(1)(H) of the Clean Air Act) 
and (B) (describing that lifecycle GHG emissions include emissions 
through the point of production (well-to-gate)); see also Guidelines to 
Determine Well-to-Gate Greenhouse Gas (GHG) Emissions of Hydrogen 
Production Pathways using 45VH2-GREET (45VH2-GREET User Manual), Sec.  
2.4.1 (Emissions of Electricity Generation), which can be

[[Page 2230]]

found at <a href="http://www.energy.gov/45vresources">www.energy.gov/45vresources</a>. The Summary of Comments and 
Explanation of Revisions to these final regulations generally refer to 
the 45VH2-GREET User Manual as it is currently publicly available, but 
at times references intended modifications to it. As further discussed 
in the Summary of Comments and Explanation of Revisions to these final 
regulations, the DOE intends to release a new version of 45VH2-GREET 
with an accompanying user manual in January 2025.
    Regarding whether a ``facility'' includes downstream property that 
uses hydrogen produced at a qualified clean hydrogen production 
facility, downstream property that does not contribute to the 
facility's process of producing qualified clean hydrogen--but instead 
only to the later use of such hydrogen following its production--is not 
part of the facility because it does not function interdependently in 
the production of the qualified clean hydrogen for which the section 
45V credit is determined. Further, Sec.  1.45V-1(a)(7)(ii) provides 
that the facility does not include equipment used to condition or 
transport hydrogen beyond the point of production.
    Regarding the effect of Sec.  1.45V-1(a)(7) on the definition of 
industrial facility under Sec.  1.45Q-2(d), whether and the extent to 
which the section 45V regulations affect terms defined in section 45Q 
is a matter that falls within the scope of section 45Q and is therefore 
not applicable to these regulations.
    Regarding whether an industrial plant or gas utility becomes part 
of the hydrogen production ``facility'' when hydrogen production 
equipment is installed at the plant or utility, such an inquiry will 
depend on the facts and circumstances of the particular hydrogen 
production equipment and whether such equipment functions 
interdependently with the existing industrial plant or utility 
equipment to produce hydrogen. Accordingly, these final regulations 
provide sufficient criteria to apply to such an inquiry on a case-by-
case basis.
b. Equipment Excluded From the Definition of Facility
    Proposed Sec.  1.45V-1(a)(7)(ii) would have provided that a 
facility does not include equipment used to condition or transport 
hydrogen beyond the point of production. Proposed Sec.  1.45V-
1(a)(7)(ii) also would have provided that a facility does not include 
electricity production equipment used to power the hydrogen production 
process, including any carbon capture equipment associated with the 
electricity production process.
    Some comments requested clarification that a ``facility'' does not 
include upstream facilities that generate and supply electricity, fuel, 
feedstock, water, ammonia, or other inputs into or for use at the 
hydrogen production facility. Another comment requested confirmation 
that a facility producing renewable natural gas (RNG) that is supplied 
to a facility that uses the RNG to produce hydrogen does not fall 
within the definition of ``facility.''
    One comment recommended that the final rules exclude from the 
definition of ``facility'' any facility that includes an electrolyzer 
stack that was assembled in or by a ``Covered Nation'' as defined in 10 
U.S.C. 4872(d)(2), or a ``Foreign Entity of Concern,'' as referenced 
under Sec.  40207 of the Infrastructure Investment and Jobs Act, Public 
Law 117-58.
    The Treasury Department and the IRS agree that clarification is 
needed on whether feedstock production equipment is part of the 
``facility.'' In addition, clarification is needed on whether feedstock 
recovery equipment is part of the ``facility.'' Although proposed Sec.  
1.45V-1(a)(7)(ii)(B) would have excluded electricity production 
equipment from the definition of ``facility,'' the proposed rules would 
not have addressed other types of feedstock production and recovery 
equipment, such as RNG production equipment. The intent of the proposed 
rules was to exclude upstream feedstock production and recovery 
equipment, such as RNG production equipment, from the definition of 
facility. Accordingly, these final regulations add ``feedstock-related 
equipment, including production, purification, recovery, 
transportation, or transmission equipment'' to the list of items 
excluded from the definition of facility in Sec.  1.45V-1(a)(7)(ii)(B). 
As discussed in this part I.A.6.c of this Summary of Comments and 
Explanation of Provisions, however, lifecycle GHG emissions associated 
with feedstock growth, gathering, extraction, processing, and delivery 
to a hydrogen production facility are still included in the lifecycle 
GHG analysis reflected in 45VH2-GREET.
    As to excluding components assembled in or by a ``Covered Nation'' 
or a ``Foreign Entity of Concern'' from the definition of facility, 
there is no provision of section 45V that imposes such a rule, so these 
final regulations do not adopt this comment.
5. Hydrogen Gas Stream, Mixed Gas or Impurity, and Productive Use
    The final regulations add three new definitions, ``hydrogen gas 
stream,'' to Sec.  1.45V-1(a)(8); ``mixed gas or impurity,'' to Sec.  
1.45V-1(a)(10); and ``productive use'' to Sec.  1.45V-1(a)(12). The 
term ``hydrogen gas stream'' means a flow of gases that includes 
hydrogen, either alone or with one or more other gases. The term 
``mixed gas or impurity'' means a non-hydrogen gas that is part of a 
hydrogen gas stream.
    The term ``productive use'' means, with respect to a hydrogen gas 
stream, a consumption of the hydrogen gas stream in a manner that 
generates positive economic value, which is determined without regard 
to the availability of the section 45V credit. The term ``productive 
use'' means, with respect to qualified clean hydrogen, a consumption of 
qualified clean hydrogen in a manner that generates positive economic 
value, which is determined without regard to the availability of the 
section 45V credit. Positive economic value is determined without 
regard to the section 45V credit, consistent with the anti-abuse rule 
of Sec.  1.45V-2(b). Thus, for example, a hydrogen gas stream produced 
with the primary purpose of obtaining the benefit of the section 45V 
credit in a wasteful manner would not have a productive use.
    All three terms are relevant to the rule where certain emissions 
related to purification are treated as through point of production, 
described in part I.A.6.d of this Summary of Comments and Explanation 
of Revisions. The term ``productive use'' also relates to the anti-
abuse rule described in part II.B of this Summary of Comments and 
Explanation of Revisions.
6. Lifecycle GHG Emissions
    Section 45V(c)(1)(A) provides that, subject to section 
45V(c)(1)(B), the term ``lifecycle greenhouse gas emissions'' has the 
same meaning given such term under section 211(o)(1)(H) of the Clean 
Air Act (42 U.S.C. 7545(o)(1)) as in effect on the date of enactment of 
section 45V. Section 45V(c)(1)(B) provides that the term ``lifecycle 
greenhouse gas emissions'' only includes emissions through the point of 
production (well-to-gate), as determined under the most recent GREET 
model, or a successor model (as determined by the Secretary). Proposed 
Sec.  1.45V-1(a)(8) would have defined ``lifecycle GHG emissions.'' The 
final regulations renumber proposed Sec.  1.45V-1(a)(8) to Sec.  1.45V-
1(a)(9).
    Proposed Sec.  1.45V-1(a)(8)(i) would have incorporated the 
statutory definitions provided in section 45V(c)(1)(A) and (B), 
specifically providing that the term has the same meaning as that in 
section 211(o)(1)(H) of the Clean Air Act as in effect on August 16, 
2022, and includes

[[Page 2231]]

emissions only through the point of production (well-to-gate) as 
determined under the most recent GREET model, or a successor model. 
These final regulations modify proposed Sec.  1.45V-1(a)(8)(i) to 
provide that, for purposes of section 45V, lifecycle GHG emissions are 
determined under the 45VH2-GREET Model. No comments were received on 
Sec.  1.45V-1(a)(8)(i), and this provision is adopted as renumbered 
Sec.  1.45V-1(a)(9)(i) without further changes.
    By reference to section 211(o)(1)(H) of the Clean Air Act, section 
45V(c)(1)(A) requires a complete assessment of direct and significant 
indirect emissions associated with a hydrogen production process. After 
consultation with the DOE and the EPA, the Treasury Department and the 
IRS interpret section 45V(c)(1)(A) with its reference to section 
211(o)(1)(H) of the Clean Air Act as excluding emissions related to the 
manufacturing of the equipment within the hydrogen production pathway 
(for example, power generators, hydrogen production facility), from the 
definition of lifecycle GHG emissions. This interpretation is 
consistent with how EPA has implemented section 211(o)(1)(H) of the 
Clean Air Act for the Renewable Fuel Standard (RFS) program.\7\
---------------------------------------------------------------------------

    \7\ Regulatory Impact Analysis, Renewable Fuel Standard Program, 
U.S. Environmental Protection Agency, EPA-420-R-10-10-006, at 311-
312 (Feb. 2010), available at <a href="https://www.regulations.gov/document/EPA-HQ-OAR-2021-0324-0652">https://www.regulations.gov/document/EPA-HQ-OAR-2021-0324-0652</a>.
---------------------------------------------------------------------------

a. Most Recent GREET Model
    Proposed Sec.  1.45V-1(a)(8)(ii) would have provided that, for 
purposes of the section 45V credit, the term ``most recent GREET 
model'' means the latest version of 45VH2-GREET developed by Argonne 
National Laboratory and published by the DOE, as provided in the 
instructions to the latest version of Form 7210, Clean Hydrogen 
Production Credit, or any successor form(s), on the first day of the 
taxable year during which the qualified clean hydrogen for which the 
taxpayer is claiming the section 45V credit was produced. Proposed 
Sec.  1.45V-1(a)(8)(ii) would have further provided that, if a version 
of 45VH2-GREET becomes publicly available after the first day of the 
taxable year of production (but still within such taxable year), then 
the taxpayer could, in its discretion, treat such later version of 
45VH2-GREET as the most recent GREET model.
    Several comments recommended changes to proposed Sec.  1.45V-
1(a)(8)(ii). Some comments requested that, instead of identifying 
45VH2-GREET as the ``most recent GREET model'' under section 
45V(c)(1)(B), the final regulations identify the R&D GREET model 
developed by Argonne National Laboratory and published by the DOE as 
the most recent GREET model. Comments further recommended that the 
final regulations require the use of 45VH2-GREET as a ``successor 
model'' only if 45VH2-GREET closely aligns in function and principle 
with the version of the R&D GREET model as it existed at the time that 
section 45V was enacted. Other comments supported 45VH2-GREET as the 
best available open-source lifecycle analysis methodology for 
determining lifecycle GHG emissions for purposes of section 45V. Yet 
another comment recommended that a model the comment had developed 
should be able to be used as an alternative to 45VH2-GREET.
    Except for changing the nomenclature of the ``most recent GREET 
model'' to the ``45VH2-GREET Model,'' as further discussed in this part 
I.A.6.a of the Summary of Comments and Explanation of Revisions, these 
final regulations do not adopt the comments recommending changes to 
proposed Sec.  1.45V-1(a)(8)(ii).
    Though the Treasury Department and the IRS continue to view 45VH2-
GREET as the most recent GREET model for the reasons described in the 
preamble to the proposed regulations and the fact that it was developed 
more recently than the R&D GREET model, the Treasury Department and the 
IRS recognize that the continued existence of the R&D GREET model and 
periodic updates to both 45VH2-GREET and the R&D GREET model have 
created some uncertainty in this regard. To avoid any potential 
uncertainty about the meaning of the most recent GREET model, which 
would be detrimental to the administration and implementation of the 
section 45V credit, the Secretary is invoking her express delegation of 
authority in section 45V(c)(1)(B) to determine 45VH2-GREET to be a 
``successor model'' and to require its use.
    In selecting 45VH2-GREET rather than the R&D GREET model or some 
other model, the Treasury Department and the IRS considered the 
statutory definition of lifecycle GHG emissions in section 211(o)(1)(H) 
of the Clean Air Act (as in effect on August 16, 2022) and the specific 
objectives of section 45V, and consulted with the DOE. 45VH2-GREET best 
meets these parameters. It is a model specifically developed by the 
Argonne National Laboratory as a derivative of and successor to the R&D 
GREET model, designed specifically to address hydrogen production 
processes and to meet the requirements and objectives of section 45V.
    The R&D GREET model has been maintained by the DOE since 1995 to 
enable research regarding lifecycle analyses of hundreds of different 
methods of producing, delivering, and using energy. The model includes 
many fuels other than hydrogen (for example, biofuels, synthetic fuels, 
fossil fuels, and electrification), and includes information that is 
based on preliminary analyses (that is, analyses that are not yet 
complete, have significant technical uncertainties, or are still being 
reviewed by laboratory staff, DOE staff, or independent experts).\8\ 
Annual updates to the model inform academic studies, informally guide 
decarbonization strategies and research and development funded by both 
the DOE and industry, and elicit stakeholder feedback that can improve 
the model, particularly with regard to preliminary pathways. R&D GREET 
is a valuable tool to characterize the benefits and impacts of energy 
technologies in a directional manner and to test out new and updated 
data and parameters, but it is not appropriate for use in analyses 
where a relatively high degree of precision and certainty is required, 
given the preliminary nature of much of the information represented, 
and where specific emissions fluxes and their representation are needed 
in a specific fashion (for example, to meet specifications within the 
statute). Moreover, because the R&D GREET model offers users many 
choices regarding analysis methodology (for example, co-product 
accounting, system boundaries, and global warming potential values), 
different users can achieve significantly different estimated GHG 
emissions rates even when representing the same facility. Many of these 
choices would not be appropriate in the specific context of the section 
45V credit given the preliminary nature of much of the data underlying 
aspects of the R&D GREET model and the fact that the model does not 
require the use of specific methodologies and accounting parameters. 
Accordingly, R&D GREET does not provide the degree of certainty, 
structure, and specificity necessary to meet the statutory requirement 
of reflecting lifecycle GHG emissions as defined by section 
211(o)(1)(H) of the Clean Air Act (as in effect on August 16, 2022), 
nor does it meet the specific objectives of such section or of the 
section 45V credit.
---------------------------------------------------------------------------

    \8\ See generally GREET, Office of Energy Efficiency & Renewable 
Energy, U.S. Department of Energy, available at <a href="https://www.energy.gov/eere/greet">https://www.energy.gov/eere/greet</a>.

---------------------------------------------------------------------------

[[Page 2232]]

    In addition, implementation of the section 45V credit will be aided 
by a user-friendly model that characterizes the lifecycle GHG emissions 
rates of different hydrogen production processes consistently, with 
high levels of confidence, and with higher fidelity than R&D GREET, and 
consistent with the requirements, purposes, and objectives of the 
section 45V credit. The DOE directed the Argonne National Laboratory to 
develop 45VH2-GREET to meet three key parameters: (1) consistency of 
background assumptions for all users and across hydrogen production 
processes, while enhancing user friendliness, (2) technical robustness 
of the processes, and (3) consistency with the other requirements and 
purposes of section 45V. Each of these parameters is explained in 
additional detail as follows.
    First, 45VH2-GREET facilitates consistent analyses across different 
processes while enhancing user friendliness. While R&D GREET allows 
users to simulate hundreds of different fuel pathways (including but 
not limited to those that involve hydrogen) and several different 
system boundaries with different user-defined assumptions, 45VH2-GREET 
exclusively allows simulations of the well-to-gate emissions associated 
with hydrogen production (as specified in section 45V(c)(1)(B) and in 
alignment with these final regulations). The simpler interface in 
45VH2-GREET as compared to R&D GREET ensures that the model is 
accessible to a broad range of taxpayers, including those without 
significant prior experience in lifecycle analysis or a GREET model.
    Second, 45VH2-GREET achieves technical robustness across hydrogen 
production pathways. Hydrogen production pathways represented in 45VH2-
GREET are a subset of those in R&D GREET and were included following 
rigorous interagency review for technical fidelity and alignment with 
the statute. While additional hydrogen production pathways are 
available in R&D GREET, many are preliminary in nature and 
inappropriate for analyses requiring relatively high precision, data 
reliability, and analytical rigor to support use in implementation of 
the section 45V credit (as described previously in this part of the 
Summary of Comments and Explanation of Revisions and further in 
supporting documentation to R&D GREET \9\). Implementation of the 
section 45V credit necessitates the use of lifecycle GHG emissions rate 
calculations that are as precise and robust as feasible, as section 
45V(b)(2) provides differing applicable percentages based on a range of 
lifecycle GHG emissions rates and section 45V(c)(2)(A) includes within 
the definition of qualified clean hydrogen only hydrogen produced with 
a lifecycle GHG emissions rate below a threshold level. Absent 
analytically robust emissions calculations, these final regulations 
would fail to implement Congress's directive to incentivize qualified 
clean hydrogen production, as distinguished among the different 
applicable percentage brackets, as well as fail to realize Congress's 
underlying objective of crediting only qualified clean hydrogen and 
providing greater credit amounts to hydrogen produced with lower 
lifecycle GHG emissions rates. As data on and analyses of additional 
hydrogen production pathways in R&D GREET become more robust, such 
pathways may be incorporated into future versions of 45VH2-GREET.
---------------------------------------------------------------------------

    \9\ Summary of Expansions and Updates in R&D GREET 2023 (2023), 
Argonne National Laboratory, available at <a href="https://greet.anl.gov/files/greet-2023-summary">https://greet.anl.gov/files/greet-2023-summary</a> (R&D GREET Supporting Documentation).
---------------------------------------------------------------------------

    Additionally, 45VH2-GREET was developed to align with the text of 
section 45V, which requires that the credit be based on the ``lifecycle 
greenhouse gas emissions'' as defined under section 211(o)(1)(H) of the 
Clean Air Act, subject to the additional requirements of section 
45V(c)(1)(B), which references the use of GREET or a successor model as 
determined by the Secretary, and limits the emissions estimates to 
``well-to-gate'' emissions. Lifecycle GHG emissions are defined in 
section 211(o)(1)(H) of the Clean Air Act to include both direct 
emissions and significant indirect emissions. R&D GREET does not 
robustly account for the variability in emissions estimates of all 
potential significant indirect emissions of certain hydrogen production 
pathways, particularly when representing counterfactual scenarios. The 
model additionally does not address the risk of significant indirect 
emissions related to changes in market behavior associated with the 
incentives created by section 45V.\10\ The proposed regulations 
therefore asked for comments on lifecycle analysis (LCA) considerations 
associated with hydrogen production pathways.
---------------------------------------------------------------------------

    \10\ For example, in a December 13, 2023, letter to the Treasury 
Department, the EPA noted that it has interpreted section 
211(o)(1)(H) of the Clean Air Act in the context of the Clean Air 
Act's RFS program. In that context, the EPA had previously 
determined that the version of ANL GREET that existed in 2010 (that 
is, R&D GREET) was not sufficient to calculate lifecycle GHG 
emissions for purposes of 211(o)(1)(H) of the Clean Air Act. The EPA 
also explained that the more recent version of ANL GREET that 
existed as of December 2023 similarly did not satisfy the relevant 
Clean Air Act criteria because it did not include the significant 
direct and indirect emissions that the EPA had previously determined 
were necessary. See Letter from Joseph Goffman, Principal Deputy 
Assistant Administrator for the Office of Air and Radiation, U.S. 
Environmental Protection Agency, to Lily Batchelder, Assistant 
Secretary for Tax Policy, U.S. Department of the Treasury (Dec. 13, 
2023), available at <a href="https://home.treasury.gov/system/files/136/Final-EPA-letter-to-UST-on-SAF-signed.pdf">https://home.treasury.gov/system/files/136/Final-EPA-letter-to-UST-on-SAF-signed.pdf</a>.
---------------------------------------------------------------------------

    In characterizing the lifecycle GHG emissions rate of a given 
hydrogen production pathway, 45VH2-GREET reflects key drivers of 
``lifecycle greenhouse gas emissions'' as defined by section 
45V(c)(1)(A) by cross-reference to section 211(o)(1)(H) of the Clean 
Air Act, subject to the additional requirements of section 
45V(c)(1)(B). Consistent with the Clean Air Act, 45VH2-GREET, in 
conjunction with the broader regulatory framework, addresses direct GHG 
emissions (for example, at a hydrogen production facility) and 
significant indirect emissions (for example, upstream emissions 
associated with electricity consumption at a hydrogen production 
facility).
    Third, 45VH2-GREET is consistent with the other requirements and 
purposes of section 45V. The accurate and fair administration of the 
section 45V credit requires the use of fixed ``background data'' 
assumptions for parameters for which bespoke inputs from hydrogen 
producers would present challenges for tax administration, which 
requires high fidelity to ensure the accurate assessment and reporting 
of lifecycle GHG emissions rates associated with the production of 
hydrogen. Allowing taxpayers to provide bespoke values for parameters 
that cannot be accurately determined at an individual taxpayer level or 
cannot be verified would invite exaggerated or understated estimates 
that could result in inaccurate section 45V credit determinations. Use 
of verifiable data ensures that the section 45V credit is available 
only to those facilities that meet statutory requirements and that the 
appropriate section 45V credit amount is determined with respect to 
those facilities. To facilitate the use of bespoke values where 
feasible and the use of appropriate alternative values where that is 
not feasible, as well as consistency across taxpayers, the proposed 
regulations introduced the concepts of ``background data'' (which 
cannot be changed by 45VH2-GREET users) and ``foreground data'' (which 
allows for bespoke inputs by 45VH2-GREET users), and 45VH2-GREET 
distinguishes between them in a consistent manner. For example, 45VH2-
GREET incorporates the GHG emissions rates of regional grids as a

[[Page 2233]]

fixed background data parameter that users cannot change. The values 
incorporated in 45VH2-GREET as background data are based on individual 
power generators' reporting to the U.S. Energy Information 
Administration (EIA), emissions factors derived from the EPA's 
Emissions & Generation Resource Integrated Database (eGRID), estimates 
of upstream emissions derived by Argonne National Laboratory, and 
estimates of transmission and distribution losses based on State level 
reporting to the EIA. Given that GHG emissions estimates of regional 
grids are derived using the best available data and science, it is 
unlikely that a given taxpayer would be able to establish a value that 
differs materially from the 45VH2-GREET default and also has high 
fidelity. Moreover, given that this parameter is expected to be 
consistent across all taxpayers within a given region, it is 
appropriate to require that all such taxpayers utilize the same value 
rather than allowing for deviation across facilities.
    Thus, 45VH2-GREET is consistent with the specific requirements of 
section 45V while maintaining R&D GREET's overall modeling approach and 
much of R&D GREET's background assumptions. This furthers the purposes 
reflected in section 45V(c)(1)(A) and (B). For these reasons, the 
Secretary has determined that 45VH2-GREET is a successor model for 
purposes of section 45V(c)(1)(B), and the final regulations require its 
use. Accordingly, proposed Sec.  1.45V-1(a)(8)(ii) is modified and 
renumbered as Sec.  1.45V-1(a)(9)(ii) to provide that the term ``45VH2-
GREET Model'' means the latest publicly available version of 45VH2-
GREET developed by Argonne National Laboratory and published by the 
DOE, as identified in the instructions to the latest version of Form 
7210, or a successor form(s), on the first day of the taxable year 
during which the qualified clean hydrogen for which the taxpayer is 
claiming the section 45V credit was produced. Additionally, as further 
discussed in this Summary of Comments and Explanation of Revisions, 
proposed Sec.  1.45V-4(a) is modified to provide that the lifecycle GHG 
emissions rate of each hydrogen production process at a qualified clean 
hydrogen production facility is determined under the 45VH2-GREET Model. 
Conforming changes have also been made throughout the regulatory text 
to replace ``most recent GREET model'' with ``45VH2-GREET Model.''
b. Differences From R&D GREET
    Several comments requested that 45VH2-GREET include all the 
pathways and technologies that are present in R&D GREET. Some of these 
comments also requested that 45VH2-GREET employ the same methodology 
used for measuring lifecycle GHG emissions as those used in R&D GREET. 
Some comments specifically requested that the transportation-related 
emissions be consistent between the two models.
    The final regulations do not adopt these comments. As described in 
the 45VH2-GREET User Manual and as described in this part I.A.6 of the 
Summary of Comments and Explanation of Revisions, some pathways may be 
included in R&D GREET but not in a given version of 45VH2-GREET because 
the pathways were still preliminary when such version of 45VH2-GREET 
was developed and/or because the pathways did not adequately address 
all key sources of direct and significant indirect emissions (as 
required for consistency with section 211(o)(1)(H) of the Clean Air 
Act). Uncertainties around many of these pathways may include 
parameters such as identification of all relevant feedstocks or the 
choice of counterfactual scenarios. These uncertainties are described 
in sections 2.1.1 and 2.1.4 of the R&D GREET Supporting Documentation. 
Some pathways, such as those using certain types of biomass, also had 
uncertainties and had not completed the 45VH2-GREET technical review 
process at the time the most recent version was released, but may be 
added in future updates as data and other parameters become more 
robust. The proposed regulations requested comments on lifecycle 
analysis considerations associated with some of the pathways that were 
not included in the initial 45VH2-GREET release (for example, certain 
RNG pathways and fugitive methane), which could inform future updates 
to the model.
    Some specific aspects of hydrogen production pathways within R&D 
GREET have completed an interagency review process, have been deemed 
sufficiently robust and, have therefore also been included in 45VH2-
GREET. Examples include default assumptions associated with methane 
leakage during natural gas transportation to a facility or assumptions 
of the emissions that result from electricity generation from specific 
generators. Thus, some assumptions related to transportation emissions 
have been made consistent between R&D GREET and 45VH2-GREET, while 
other assumptions are still too uncertain to include in 45VH2-GREET but 
may be included if deemed sufficiently robust in the future based on 
evaluation by interagency technical experts.
    R&D GREET is used for a range of purposes, including academic 
studies and research that do not necessarily require verification of 
assumptions with real-world data at specific facilities and at times 
rely on small and therefore uncertain sample sizes or datasets. 
Implementation of the section 45V credit, however, requires that 
information used to calculate the lifecycle GHG emissions rate reflect 
a given taxpayer's actual operation with a reasonable degree of 
certainty and be subject to independent verification where possible or, 
where not, that values used appropriately reflect the range of 
possibilities rather than allowing use of unverifiable inputs that 
inappropriately maximize the amount of the section 45V credit. As 
described previously, use of verifiable data is necessary in the 
context of tax administration and in particular with respect to the 
section 45V credit where eligibility for the amount of the credit is 
based on the facility's lifecycle GHG emissions rate.
c. Emissions Through the Point of Production (Well-to-Gate)
    Proposed Sec.  1.45V-1(a)(8)(iii) would have provided that, for 
purposes of section 45V(c)(1)(B) and proposed Sec.  1.45V-1(a)(8)(i), 
the term ``emissions through the point of production (well-to-gate)'' 
means the aggregate lifecycle GHG emissions related to hydrogen 
produced at a hydrogen production facility during the taxable year 
through the point of production. Further, proposed Sec.  1.45V-
1(a)(8)(iii) would have provided that such term includes emissions 
associated with feedstock growth, gathering, extraction, processing, 
and delivery to a hydrogen production facility. Finally, proposed Sec.  
1.45V-1(a)(8)(iii) would have provided that such term includes the 
emissions associated with the hydrogen production process, inclusive of 
the electricity used by the hydrogen production facility and any 
capture and sequestration of carbon dioxide generated by the hydrogen 
production facility.
    Some comments requested clarification on the definition of ``well-
to-gate'' and whether emissions related to hydrogen purification, 
compression, liquefaction, transport, storage, and other activities are 
included in the definition for purposes of calculating the lifecycle 
GHG emissions rate of the hydrogen. Other comments provided feedback on 
the requirement in proposed Sec.  1.45V-1(a)(8)(iii) that

[[Page 2234]]

taxpayers calculate the lifecycle GHG emissions rate of hydrogen 
produced at a hydrogen production facility based on the aggregate 
amount of hydrogen produced at the facility over the taxable year (in 
other words, use the average annual emissions rate). While some 
comments supported requiring taxpayers to calculate the lifecycle GHG 
emissions rate of hydrogen on an annual basis, other comments requested 
that taxpayers be permitted to calculate the lifecycle GHG emissions 
rate of hydrogen produced at their facility on a more granular basis. 
One comment expressed disappointment that the Treasury Department and 
the IRS did not engage States in defining lifecycle GHG emissions. 
Another comment recommended that the final regulations require State 
governments to adopt regulations to complement and enhance section 45V. 
Finally, one comment requested that the term ``emissions through the 
point of production (well-to-gate)'' exclude emissions from the 
production of hydrogen during natural disasters, emergency events, 
start-ups, shut-downs, and maintenance activities.
    Regarding the request for clarification of whether specific 
activities fall within the well-to-gate system boundary, the definition 
of ``emissions beyond the point of production (well-to-gate)'' in 
proposed Sec.  1.45V-1(a)(8)(iii) and renumbered as Sec.  1.45V-
1(a)(9)(iii) is sufficiently clear. Comments have indicated confusion, 
however, as to how the well-to-gate system boundary and the definition 
of facility interact. To clarify, the well-to-gate system boundary for 
purposes of determining the lifecycle GHG emissions rate of a process 
is distinct from the definition of facility for Federal income tax 
purposes. First, as specified in Sec.  1.45V-1(a)(9)(iii), the well-to-
gate system boundary includes certain emissions that occur upstream of 
the facility. For example, the well-to-gate system boundary includes 
emissions associated with feedstock growth, gathering, extraction, 
processing, and delivery to a hydrogen production facility. While such 
emissions are included in the well-to-gate system boundary, equipment 
used in such upstream activities--such as electricity generating 
equipment--is not part of the facility, as specified in Sec.  1.45V-
1(a)(7)(ii)(B). Second, as further specified in Sec.  1.45V-
1(a)(9)(iii), the well-to-gate system boundary also includes all 
emissions resulting from the facility's hydrogen production process, 
inclusive of the production of a mixed gas or impurity and the 
electricity used by the hydrogen production facility and any capture 
and sequestration of carbon dioxide generated by the hydrogen 
production facility. This includes emissions resulting from the use of 
all components that function interdependently to produce the qualified 
clean hydrogen for which the section 45V credit is determined. 
Emissions from activities that occur after the facility's hydrogen 
production process is complete, such as liquefaction, storage, or 
transport, are generally beyond the well-to-gate system boundary. The 
final regulations include a non-exhaustive list of examples of such 
activities in Sec.  1.45V-1(a)(9)(iii). Finally, as explained in part 
I.A.6.d, Sec.  1.45V-1(a)(9)(iv) is added to provide that emissions 
that result from certain purification activities that occur downstream 
of the facility's qualified clean hydrogen production process are still 
within the well-to-gate system boundary. Even though equipment used in 
such purification activities is not part of the facility, emissions 
associated with such purification are nevertheless within the well-to-
gate system boundary for purposes of determining the section 45V 
credit.
    However, the Treasury Department and the IRS, based on advice of 
the DOE, note that, in situations where a man-made chemical is produced 
using hydrogen feedstock (for example, ammonia), and is later cracked 
or ``dehydrogenated'' to release the hydrogen, the chemical represents 
a means of hydrogen storage and the cracking step releases the hydrogen 
from such storage. These steps occur downstream of hydrogen production 
and are therefore outside of the well-to-gate system boundary, and also 
do not constitute a distinct hydrogen production process. Accordingly, 
hydrogen released from cracking such chemicals cannot be used to claim 
the section 45V credit.
    Regarding the requirement that taxpayers calculate the lifecycle 
GHG emissions rate of their hydrogen on an annual basis, these comments 
are addressed in response to comments received on proposed Sec.  1.45V-
4(a) in part III.A of this Summary of Comments and Explanation of 
Revisions.
    Regarding a comment's criticism that the Treasury Department and 
the IRS did not engage the States in defining lifecycle GHG emissions, 
this term is defined in section 45V(c)(1)(A) as having the same meaning 
given such term under section 211(o)(1)(H) of the Clean Air Act. 
Moreover, States were afforded the opportunity to comment on the 
proposed regulations, and some did. Section 45V does not require State 
governments to take any action or to enact any legislation to 
complement section 45V. Section 45V provides a Federal income tax 
credit to owners of qualified clean hydrogen production facilities for 
the production of qualified clean hydrogen and imposes no obligations 
on the States. Accordingly, these final regulations do not adopt the 
request to require the States to enact legislation to complement 
section 45V.
    Finally, regarding the request to exclude emissions from the 
production of hydrogen during periods of natural disasters, emergency 
events, start-ups, shut-downs, and maintenance activities, section 
45V(c)(1) does not provide for or contemplate any such exceptions. 
These final regulations, therefore, do not adopt this comment's 
suggestion.
d. Certain Emissions Related to Purification Treated as Through Point 
of Production
    In consultation with the DOE, the final regulations add a new Sec.  
1.45V-1(a)(9)(iv), which addresses emissions attributable to the 
purification of hydrogen. Section 1.45V-1(a)(9)(iv) provides that, if 
the taxpayer knows or has reason to know the purification of a hydrogen 
gas stream (that is, removal of a mixed gas or impurity) is necessary 
for a hydrogen gas stream to be productively used, or to be sold for 
productive use, any lifecycle GHG emissions relating to such 
purification (for example, emissions from electricity used in 
purification, or carbon dioxide that is separated from a hydrogen gas 
stream and then vented as part of purification) are treated as 
emissions through the point of production (well-to-gate). Additionally, 
if the taxpayer knows or has reason to know that a hydrogen gas stream 
contains less than 99 percent hydrogen and will be combusted without 
purification, any lifecycle GHG emissions relating to the purification 
needed to purify the hydrogen gas stream to contain 99 percent hydrogen 
are treated as emissions through the point of production (well-to-
gate). Section1.45V-1(a)(9)(v) provides an example to illustrate this 
rule.
    To ascertain the emissions associated with production of hydrogen 
in a manner that is consistent with section 45V, which requires that 
section 45V credit eligibility be determined on the basis of 
``kilograms of CO2e per kilogram of hydrogen'', 45VH2-GREET levelizes 
all well-to-gate emissions associated with a hydrogen production 
process over only the kilograms of pure hydrogen produced. This 
includes emissions attributable to the purification of a hydrogen gas 
stream to remove a mixed gas or impurity. Emissions attributable to 
purification

[[Page 2235]]

include emissions associated with energy consumption (for example, 
electricity consumed by purification equipment or by equipment used for 
carbon dioxide capture), as well as greenhouse gases that are separated 
out by purification equipment and not sequestered (for example, carbon 
dioxide that is captured and then vented).
    Previous versions of 45VH2-GREET accounted for carbon dioxide 
emissions that may occur from the conversion of impurities or mixed 
gases downstream of the hydrogen production facility, thus including 
such emissions in the levelization. This approach will be revised in 
the forthcoming January 2025 version of 45VH2-GREET, such that 
emissions outside of the well-to-gate boundary are not accounted for in 
determining a process' lifecycle GHG emissions rate for purposes of 
section 45V. Qualified clean hydrogen production facilities can 
therefore be designed to achieve the level of purity required for sale 
or use (subject to the rules of section 45V and these final 
regulations), without regard to the carbon dioxide emissions that may 
occur from the conversion of impurities or mixed gases downstream (for 
example, the ultimate conversion to carbon dioxide of methanol produced 
from a mixed gas stream of hydrogen and carbon monoxide).
    As the result of the January 2025 modification to 45VH2-GREET and 
the 45VH2-GREET User Manual, and to clarify the appropriate well-to-
gate boundary, these final regulations, following consultation with the 
DOE, clarify the definition of emissions through the point of 
production (well-to-gate) to address emissions attributable to 
purification that the taxpayer knows or has reason to know are 
necessary in order for the hydrogen gas stream to be productively used, 
regardless of where such purification occurs. These emissions are 
properly treated as occurring within the well-to-gate boundary in Sec.  
1.45V-1(a)(9)(iv).
    In certain cases--absent the section 45V credit--the taxpayer would 
normally purify a hydrogen gas stream prior to it being productively 
used or sold for productive use, and such purification would have 
lifecycle GHG emissions attributed to the hydrogen produced. Taxpayers, 
however, could have an incentive to claim that the purification (and 
its attendant emissions) occurs beyond the hydrogen production 
``gate.'' If these emissions occur outside of the ``gate,'' then they 
would not be attributed in 45VH2-GREET to the hydrogen production 
process and therefore would not be included in the hydrogen production 
process' lifecycle GHG emissions rate for purposes of determining the 
amount of the section 45V credit. The taxpayer may, for example, forgo 
hydrogen purification that it would have performed absent the incentive 
of the section 45V credit, and produce comparatively ``impure 
hydrogen.'' The ``impure hydrogen'' may then be sold to a customer who 
would purify the hydrogen gas stream (something it would not need to do 
absent the incentive to the hydrogen producer due to the section 45V 
credit), thereby generating lifecycle GHG emissions that the taxpayer 
was able to forgo. Similarly, a taxpayer could have an incentive to 
instead sell a stream of impure hydrogen and a mixed gas or impurity 
(such as carbon monoxide), instead of the purified hydrogen gas stream, 
for combustion. The DOE has advised that, absent the section 45V 
credit, hydrogen gas streams are consistently sold at purity levels 
well above 99 percent today and that customers would likely have to 
substantially modify their operations to accept less pure gas streams. 
Therefore, DOE has advised that the predominant motivation to sell 
hydrogen for combustion at lower purities would be so the emissions 
associated with those impurities would not be accounted for within the 
well-to-gate boundary.
    These circumstances would be inconsistent with a purpose of section 
45V, which is to provide an incentive to produce qualified clean 
hydrogen and to provide a higher incentive to produce qualified clean 
hydrogen as more lifecycle GHG emissions are avoided. Producing 
hydrogen with a lower lifecycle GHG emissions rate and receiving a 
section 45V credit reflecting such an emissions rate in the case where 
the taxpayer knows or has reason to know that the customer must further 
purify the hydrogen gas stream (and emit additional emissions) so that 
such gas stream can be productively used by its customer is contrary to 
this purpose and to the requirement in section 45V(c)(2)(B)(i)(II) for 
hydrogen to be produced in the ordinary course of a trade or business 
of the taxpayer. To address this, and consistent with the purposes of 
section 45V, in cases where the taxpayer knows or has reason to know 
that additional purification is needed for a hydrogen gas stream to be 
productively used, the final regulations clarify that the emissions 
associated with the purification needed to produce the hydrogen for a 
productive use occur within the well-to-gate boundary. Likewise, in 
cases where the taxpayer knows or has reason to know that a hydrogen 
gas stream contains less than 99 percent hydrogen and will be combusted 
without purification, emissions that would have resulted from purifying 
the hydrogen gas stream to that percentage prior to combustion are 
treated as emissions within the well-to-gate boundary.
    The final regulations are consistent with the treatment of 
emissions related to purification in the January 2025 version of 45VH2-
GREET, which treats emissions attributable to purification that the 
taxpayer knows or has reason to know are necessary in order for the 
hydrogen gas stream to be productively used as within the gate.
7. Process
    Section 45V(c)(1)(A) and (B) establish the boundaries for 
determining lifecycle GHG emissions rates associated with the 
production of hydrogen. Section 45V(c)(1)(A) mandates consideration of 
GHG emissions that are described in section 211(o)(1)(H) of the Clean 
Air Act. Section 45V(c)(1)(B) further specifies that the term 
``lifecycle greenhouse gas emissions'' only includes emissions through 
the point of production (well-to-gate), as determined under the most 
recent GREET model or a successor model as determined by the Secretary. 
Accordingly, section 45V(c)(1)(B) specifies an ending boundary (that 
is, the gate of a hydrogen production facility) for the emissions that 
must be considered for purposes of the section 45V credit. It also 
specifies a model for use in determining lifecycle GHG emissions rates. 
Taken together, these statutory rules provide the boundaries for 
assessing lifecycle GHG emissions for purposes of section 45V.
    Section 45V provides authority for the Secretary to specify and 
clarify how to determine lifecycle GHG emissions rates within these 
statutorily determined boundaries. Exercise of this authority is 
necessary because this statutory framework must address a wide range of 
hydrogen production processes that are currently viable or that may 
become viable in the future, the technical details of each hydrogen 
production process, and scientific advancements and uncertainties 
associated with lifecycle GHG analyses. Congress acknowledged that the 
Secretary would need to identify a system for determining lifecycle GHG 
emissions rates and expressly delegated to her the authority to do so 
in section 45V(f), which provides ``the Secretary shall issue 
regulations or other guidance to carry out the purposes of this 
section, including regulations or other guidance for determining 
lifecycle greenhouse gas

[[Page 2236]]

emissions.'' As noted previously, this authority is cabined by the 
directives in the statute, most critically the directive to measure 
well-to-gate lifecycle GHG emissions as defined by section 211(o)(1)(H) 
of the Clean Air Act.
    The term ``process,'' as used in sections 45V(b)(2)(A) through (D) 
and in section 45V(c)(2)(A), is a parameter that requires further 
clarification. Proposed Sec.  1.45V-4(a) and (b) would have required 
the section 45V credit to be determined according to the lifecycle GHG 
emissions rate of all hydrogen produced at a hydrogen production 
facility during the taxable year. Under this proposal, the term 
``process'' included all the operations and inputs used by a facility 
to produce hydrogen during a taxable year.
    The Treasury Department and the IRS received a number of comments 
which led to a reconsideration of how the term ``process'' is used in 
determining lifecycle GHG emission rates. After reviewing these 
comments and reexamining the meaning of the term ``process'' as it 
relates to the structure and purposes of section 45V, these final 
regulations add Sec.  1.45V-1(a)(11) to define the terms ``process'' 
and ``primary feedstock,'' as discussed further in this part I.A.7 of 
this Summary of Comments and Explanation of Revisions. These final 
regulations also make a corresponding modification to Sec.  1.45V-1(b) 
regarding the amount of the credit.
    Several comments recommended that 45VH2-GREET allow for the 
blending of feedstocks, like natural gas and RNG. In the case of RNG, 
comments claimed that given the high cost of RNG, combining RNG with 
conventional natural gas could create certain market efficiencies that 
would justify the combined use of RNG and natural gas. Several comments 
opposed allowing the mixing of RNG (or other types of biomethane) with 
conventional natural gas to produce clean hydrogen; in particular, one 
comment noted that ``splash blending,'' or combining small amounts of 
RNG with conventional natural gas, could cost the U.S. government 
billions of dollars annually while potentially increasing overall 
emissions. According to one comment, to avoid splash blending, each 
methane-based feedstock should be considered a separate production 
line.
    Section 45V generally requires that lifecycle GHG emissions rates 
be determined according to the process by which the hydrogen is 
produced. Section 45V(b)(2) provides the rules for determining the 
applicable percentages that are ultimately used to calculate the amount 
of the section 45V credit. In general, section 45V(b) requires 
applicable percentages to be determined with respect to ``qualified 
clean hydrogen which is produced through a process that results in a 
lifecycle greenhouse gas emissions rate'' that falls within statutorily 
mandated emissions rate ranges. Section 45V(c)(2)(A) defines the term 
qualified clean hydrogen as hydrogen that is produced through a process 
that results in a lifecycle greenhouse gas emissions rate of not 
greater than 4 kilograms of CO2e per kilogram of hydrogen.
    Section 45V does not expressly define the term ``process.'' The 
plain meaning of the term ``process'' is ``a series of actions or 
operations conducing to an end.'' \11\ In particular, for lifecycle 
assessment purposes, the term ``process'' has been defined as a ``set 
of interrelated or interacting activities that transforms inputs into 
outputs.'' \12\ Building upon these definitions, combined with the 
statutory distinctions between processes that result in different 
specified ranges of lifecycle GHG emissions rates, the statutory text 
indicates that the term ``process'' necessarily includes a degree of 
uniformity and consistency among those inputs that can meaningfully 
differ in their GHG intensity. Section 45V(b)(2) provides varying 
credit amounts for hydrogen that is ``produced through a process that 
results in a lifecycle greenhouse gas emissions rate'' that falls into 
specified ranges. The term ``process'' must therefore mean more than 
just the production technique because the same production technique, 
such as steam methane reforming, could produce lifecycle GHG emissions 
rates that fall into different ranges specified in the statute 
depending on the inputs used. The statute differentiates between ``a 
process that results in'' one specified range of GHG emissions rates 
from ``a process that results in'' a different specified range of GHG 
emissions rates. See section 45V(b)(2)(A) through (D). The only 
effective way to distinguish between hydrogen production processes is 
to define the term ``process'' with respect to both the production 
technique and a class of uniform or similar inputs used in that 
technique.
---------------------------------------------------------------------------

    \11\ Process, Merriam-Webster Dictionary, available at <a href="https://www.merriam-webster.com/dictionary/process">https://www.merriam-webster.com/dictionary/process</a>.
    \12\ International Organization for Standardization, ISO 
14040:2006, Environmental Management--Life Cycle Assessment--
Principles and Framework (2d ed. 2006).
---------------------------------------------------------------------------

    This interpretation of the term ``process'' is consistent with the 
chemical transformations that are used to produce hydrogen, and with 
the language in section 45V. Treating input feedstocks with 
significantly different attributes as part of the same hydrogen 
production process (for example, by averaging the attributes of 
multiple types of methane used over a time period) often would not 
accurately reflect the chemical dynamic whereby each molecule of 
hydrogen originates from distinct source-molecule inputs that have 
distinct attributes affecting the lifecycle emissions of each hydrogen 
molecule and, as a result, often would not reflect the lifecycle GHG 
emissions rate of the resulting hydrogen molecules, as required by the 
statute. The most granular approach to assessing lifecycle GHG 
emissions would therefore be to match each molecule of hydrogen with 
its molecular inputs and identify the lifecycle emissions associated 
with the resulting hydrogen. However, this level of granularity is 
impractical to administer and unnecessary to implement the statute. The 
feasible and appropriate approach to aggregating molecules is to assess 
each hydrogen production process by grouping source molecules into 
categories of primary feedstock.
    This aggregation approach best implements the statutory 
requirements of section 45V because the production of hydrogen using 
inputs with similar attributes can be expected to produce consistent 
emissions results, allowing the appropriate determination of 
eligibility and credit amounts under section 45V. An approach that 
incorrectly assumed all hydrogen molecules are a blend of feedstocks 
would not yield a correct lifecycle assessment, would have perverse 
incentive effects (as discussed subsequently in this Summary of 
Comments and Explanation of Revisions), and would be no more 
administrable than the approach adopted in these final rules.
    With the exception of geologic hydrogen, all hydrogen production 
processes involve conversion of hydrogen-containing molecules into pure 
hydrogen. In electrolysis, for example, the feedstock--the source of 
the hydrogen molecules--is water, which contains no carbon and 
therefore does not directly produce carbon dioxide (or other GHGs) in 
the production of hydrogen. By contrast, in steam methane reforming, 
the feedstock is water and methane, which produces hydrogen and carbon 
dioxide when reformed. In pyrolysis, the feedstock is organic matter, 
which produces hydrogen and solid carbon when pyrolyzed. In methane 
pyrolysis, the feedstock is methane, which is converted into hydrogen 
and solid

[[Page 2237]]

carbon through the application of high temperatures.
    Energy attributes and lifecycle GHG emissions can vary considerably 
among hydrogen-containing feedstocks. For instance, the water inputs 
into electrolysis generally have limited upstream emissions and zero 
direct GHG emissions from the chemical reaction that produces hydrogen. 
Hydrocarbon inputs into methane reforming produce a standard quantity 
of direct emissions through the chemical reaction that produces 
hydrogen, but upstream emissions vary considerably for different 
sources. Different hydrocarbon inputs have significantly different 
upstream practices (for example, methods of gathering, processing, or 
delivery) and counterfactuals, among other factors, which result in 
dramatic differences in resulting lifecycle GHG emissions rates of 
producing hydrogen from that methane source.
    Because of the potential for significant variation in the lifecycle 
GHG emissions rates associated with different inputs, and the structure 
of section 45V, it is necessary to assess hydrogen production using 
different hydrogen-containing feedstocks as distinct processes. 
Accordingly, these final regulations distinguish processes based on 
their hydrogen-containing feedstock, which is referred to in these 
final regulations as a ``primary feedstock.'' A ``primary feedstock'' 
is defined in Sec.  1.45V-1(a)(11) as a hydrogen-containing chemical 
that is transformed to produce hydrogen at a hydrogen production 
facility and has uniform or similar attributes distinguished by the 
source from which it is derived, if such source materially affects the 
lifecycle GHG emissions rate associated with use of the chemical to 
produce hydrogen.
    If the term ``process'' were instead interpreted to encompass 
feedstocks with significantly different attributes as relevant to 
determining lifecycle GHG emissions, then the approach to determining 
whether a ``process'' has comported with statutorily prescribed 
lifecycle GHG emissions rate ranges for the purposes of determining the 
amount of the section 45V credit would not effectively, in fact, 
incentivize the production of hydrogen within a specific lifecycle GHG 
emissions rate range. For example, allowing a process to calculate a 
single emissions rate based on a mix of feedstocks with disparate 
attributes would increase the risk that hydrogen production that would 
otherwise not meet the statutory emissions requirements receives the 
section 45V credit simply by virtue of being commingled or averaged 
with hydrogen production that does meet the statutory emissions 
requirements using other inputs. This would be a foreseeable and 
inappropriate result if, as several comments urged, the term 
``process'' were interpreted as any activities and inputs that resulted 
in the production of a kilogram of hydrogen. The statute's singular 
reference to ``a process'' and ``a lifecycle greenhouse gas emissions 
rate'' indicates that the statutory references to the term ``process'' 
requires evaluation on the basis of each specific process, with 
uniformity and consistency across its operations and primary feedstock 
that generally results in a consistent lifecycle GHG emissions rate. 
Defining the term ``process'' based solely on the type of a facility's 
operations that produce hydrogen (for example, steam methane reforming 
or autothermal reforming) is not appropriate because such operations 
could rely on feedstocks with materially different attributes and 
carbon intensities, which would result in very different lifecycle GHG 
emission rates that would not be observable if feedstocks are 
aggregated. Thus, feedstocks to a process should have attributes with a 
sufficient degree of uniformity and consistency to be considered part 
of the same ``process.'' Separately evaluating each hydrogen production 
process at a qualified clean hydrogen production facility is consistent 
with the statutory language and scheme of section 45V, which requires 
accuracy in determining ``a lifecycle [GHG] emissions rate'' for 
hydrogen produced via ``a process.'' See section 45V(c)(2)(A).
    For these reasons, consistent with the transformation of feedstock 
in the production of hydrogen, Sec.  1.45V-1(a)(11) defines the term 
``process'' to mean the operations conducted by a facility to produce 
hydrogen (for example, electrolysis or steam methane reforming) during 
a taxable year using one primary feedstock. A facility producing 
hydrogen through electrolysis, for example, will have a single hydrogen 
production process in a taxable year with water as its primary 
feedstock. Electricity with different attributes would not result in 
distinct processes because electricity is not a primary feedstock (that 
is, it is not contributing hydrogen atoms to the hydrogen molecule); 
additionally, electricity cannot be differentiated at the molecular 
level. Electricity and heat are integral to the operations of hydrogen 
production facilities, and the form of energy used by a facility (for 
example, electricity versus heat) plays an essential role in discerning 
different hydrogen production processes. The energy powering a 
facility's operations enables the chemical transformation of molecular 
feedstocks into hydrogen, but energy does not itself contribute atoms 
to the hydrogen produced by a facility. Thus, the final regulations do 
not treat electricity and heat as primary feedstocks, but instead 
require tracking and assessing the emissions associated with energy 
used in a process through different mechanisms, as described in part 
III.D of this Summary of Comments and Explanation of Revisions and 
specified in 45VH2-GREET. For a facility that produces hydrogen through 
steam methane reforming using fossil natural gas, for example, the 
combination of fossil natural gas and water would be considered one 
primary feedstock because hydrogen molecules derive from both fossil 
natural gas and water and this form of hydrogen production requires use 
of both water and methane. Thus, a facility producing hydrogen 
exclusively through reforming of fossil natural gas with water would 
have a single hydrogen production process in a taxable year. A facility 
producing hydrogen through reforming of both fossil natural gas and RNG 
from animal manure with water would have two hydrogen production 
processes in that year; the primary feedstock for one process would be 
fossil natural gas and water, and the primary feedstock for the other 
process would be RNG from animal manure and water.
    As further specified in the 45VH2-GREET User Manual and reflected 
in 45VH2-GREET, some types of primary feedstocks are distinguished by 
their origin (for example, methane from a specific source), as well as 
attributes of that source as relevant to determining lifecycle GHG 
emissions. While these final regulations cannot anticipate and address 
all possible primary feedstocks that may be utilized for hydrogen 
production, the Treasury Department and the IRS note that it is 
currently appropriate to treat fossil natural gas, RNG derived from 
landfill gas, RNG derived from animal waste, RNG derived from 
wastewater treatment plants, and gas derived from coal mine methane as 
distinct primary feedstocks. If a facility uses any of these gas 
streams in combination with water via interdependent steps (for 
example, in the case of reforming), then the combination of that gas 
stream (for example, fossil natural gas, RNG derived from landfill gas, 
etc.) and water is a singular primary feedstock. Such treatment 
implements the definition of primary feedstock adopted here, which 
treats as a single feedstock that which

[[Page 2238]]

has uniform or similar attributes distinguished by the source from 
which it is derived, if such source materially affects the lifecycle 
GHG emissions associated with use of the molecule to produce hydrogen.
    If a facility utilizes more than one primary feedstock to produce 
hydrogen, then that facility will have an equal number of separate 
hydrogen production processes that each must be assessed separately to 
determine a lifecycle GHG emissions rate for the quantity of hydrogen 
produced through that process for purposes of section 45V. For example, 
if a taxpayer procures RNG sourced from a blend of sources, the 
taxpayer must account for the share of RNG derived from each source 
distinctly within 45VH2-GREET or an Emissions Value Request 
Application. Future releases of 45VH2-GREET and analyses conducted 
through the DOE's EVRP may address additional primary feedstocks, but 
any new primary feedstock must also be treated as distinct.
    The Treasury Department and the IRS note that there is precedent 
for this type of approach for assessing emissions associated with the 
production of fuels. The RFS is another example of a framework that 
requires a determination of what activities should be aggregated or 
separated for purposes of lifecycle analysis to determine GHG 
emissions. Similar to the approach provided for here, the RFS conducts 
LCAs for distinct feedstock-technology-output combinations because 
those combinations have the potential to have distinct lifecycle 
emissions that should be credited differently under the RFS's statutory 
scheme. See ``Regulation of Fuels and Fuel Additives: Changes to 
Renewable Fuel Standard Program,'' 75 FR 14670, 14713 (Mar. 26, 2010) 
(EPA final regulation providing that different combinations of 
feedstock, production process, and fuel that result in different 
lifecycle GHG outcomes must be evaluated separately).
8. Qualified Clean Hydrogen
    Section 45V(c)(2)(A) provides that ``qualified clean hydrogen'' 
means hydrogen which is produced through a process that results in a 
lifecycle GHG emissions rate of not greater than 4 kilograms of CO2e 
per kilogram of hydrogen. Further, section 45V(c)(2)(B) provides that 
such term does not include any hydrogen unless the production and sale 
or use of such hydrogen is verified by an unrelated party, and such 
hydrogen is produced in the United States (as defined in section 638(1) 
of the Code) or a United States possession (as defined in section 
638(2)); in the ordinary course of a trade or business of the taxpayer; 
and for sale or use. Proposed Sec.  1.45V-1(a)(9) substantially repeats 
the statutory definition.
    Several comments requested clarification on the definition of 
``qualified clean hydrogen.'' Some comments requested clarification 
that hydrogen does not need to be of a certain level of purity to 
constitute ``qualified clean hydrogen.'' Specifically, comments 
requested clarification that ``qualified clean hydrogen'' includes 
hydrogen that is produced as one of several constituents in a gas 
stream so long as the gas stream is valorized. The comments suggested 
that the statute does not specify that the hydrogen production must 
isolate the hydrogen or that the gas stream containing the hydrogen 
achieve a certain threshold hydrogen content to be eligible for the 
credit. These comments further suggested that requiring hydrogen to be 
separated from other components in a gas stream when those components 
would be immediately recombined with the hydrogen would be inefficient. 
One comment requested clarification on whether there are specific 
metering requirements for monitoring the purity of the hydrogen.
    These final regulations do not modify the definition of ``qualified 
clean hydrogen'' to specify a certain level of purity, or to specify 
that no level of purity is required. A purity requirement does not need 
to be added to the definition of ``qualified clean hydrogen'' because 
45VH2-GREET already accounts for impurities by assessing the well-to-
gate emissions of a hydrogen production facility over only the 
kilograms of pure hydrogen produced. The treatment of mixed gases or 
impurities is further discussed in part I.A.6.d. of this Summary of 
Comments and Explanation of Revisions.
    The decisions to characterize well-to-gate emissions of hydrogen 
based only on the kilograms of pure hydrogen produced, and to address 
impurities through the well-to-gate lifecycle GHG emissions analysis 
(in 45VH2-GREET or the PER process)--rather than by requiring hydrogen 
to be of a certain level of purity--are consistent with Congress's 
directive under section 45V(c)(1)(A) and (B) to determine lifecycle GHG 
emissions as defined under section 211(o)(1)(H) of the Clean Air Act 
and 45VH2-GREET.
    As to the request for clarification on whether there are specific 
metering requirements for monitoring the purity of the hydrogen, as 
discussed in this part, impurities are accounted for through the well-
to-gate lifecycle GHG emissions analysis (in 45VH2-GREET or the PER 
process). Metering requirements for all relevant inputs into 45VH2-
GREET, including purity, are addressed in Sec.  1.45V-5(g)(5), and no 
special metering requirements for purity, apart from those specified in 
Sec.  1.45V-5(g)(5), are needed.
9. For Sale or Use
    For purposes of section 45V(c)(2)(B)(i)(III) and proposed Sec.  
1.45V-1(a)(9)(i)(C), proposed Sec.  1.45V-1(a)(9)(ii) would have 
provided that, the term ``for sale or use'' means for the primary 
purpose of making hydrogen ready and available for sale or use. 
Following production, storage of hydrogen before its sale or use would 
not disqualify such hydrogen from being considered produced for sale or 
use. No comments were received on proposed Sec.  1.45V-1(a)(9)(ii), and 
this provision is adopted without change as renumbered Sec.  1.45V-
1(a)(13)(ii).

B. Amount of Credit

1. In General
    Under section 45V(a), the clean hydrogen production credit is based 
on the amount of qualified clean hydrogen produced ``during the 10-year 
period beginning on the date such facility was originally placed in 
service'' multiplied by the applicable amount identified in section 
45V(b). Proposed Sec.  1.45V-1(b)(1) would have incorporated this 
calculation of the amount of credit by providing that the amount of the 
section 45V credit determined under section 45V(a) and the section 45V 
regulations for any taxable year is the product of the kilograms of 
qualified clean hydrogen produced by the taxpayer during such taxable 
year at a qualified clean hydrogen production facility during the 10-
year period beginning on the date such facility was originally placed 
in service, multiplied by the applicable amount with respect to such 
hydrogen.
    Several comments requested changes related to the 10-year credit 
period and the placed in service date specified in proposed Sec.  
1.45V-1(b)(1). One comment requested that the 10-year credit period be 
tolled for circumstances beyond the taxpayer's control or during 
periods of diminished capacity. Another comment requested that the 
placed in service date of a qualified clean hydrogen production 
facility be delayed until operational testing is complete and 
commercial quantities of hydrogen are produced. Another comment 
requested that the final regulations provide that a qualified clean 
hydrogen production facility cannot be placed in service until after 
December 31, 2022. This comment

[[Page 2239]]

suggested that, prior to January 1, 2023, it was impossible to produce 
qualified clean hydrogen because section 45V, which established what is 
qualified clean hydrogen, did not become effective until that date. 
Thus, this comment suggested, no hydrogen production facility could 
properly be treated as having been placed in service as a ``qualified 
clean hydrogen production facility'' until that date.
    Another comment requested clarification of the requirements for 
pre-existing facilities that were originally placed in service prior to 
the enactment of section 45V and the extent to which such facilities 
can claim the section 45V credit for the years remaining in the 10-year 
period beginning on the date such facilities were originally placed in 
service.
    These final regulations do not adopt the changes to proposed Sec.  
1.45V-1(b)(1) recommended by these comments. Section 45V(a) establishes 
that the credit is based, in part, on the placed in service date and 
the definition of ``placed in service'' is sufficiently clear as an 
established tax concept. Section 1.46-3(d)(1) provides that, for 
purposes of the section 38 credit (which includes the clean hydrogen 
production credit determined under section 45V, see section 38(b)(36)), 
property is considered placed in service in the earlier of the taxable 
year in which, under the taxpayer's depreciation practice, the period 
for depreciation with respect to such property begins; or the taxable 
year in which the property is placed in a condition or state of 
readiness and availability for a specifically assigned function, 
whether in a trade or business, in the production of income, in a tax-
exempt activity, or in a personal activity. Examples of property that 
is considered in a condition or state of readiness and availability for 
a specifically assigned function are set forth in Sec.  1.46-3(d)(2). 
Section 1.46-3(d)(2)(ii) provides that operational farm equipment that 
is acquired during the taxable year and is not practicable to use until 
the following year is still considered ready and available for its 
assigned function in the taxable year. Section 1.46-3(d)(2)(iii) 
provides that equipment that is operational but is still undergoing 
testing to eliminate any defects is still considered ready and 
available for its assigned function. These examples clarify that 
property can be ready and available for its assigned function 
regardless of the level of production attained.
    Various revenue rulings and case law have established a five-factor 
test for determining when a facility is placed in service, including 
(1) whether the necessary permits for operation have been obtained; (2) 
whether critical preoperational testing has been completed; (3) whether 
the taxpayer has control of the facility; (4) whether the unit has been 
synchronized with the transmission grid; and (5) whether daily or 
regular operation has begun. See Ampersand Chowchilla Biomass, LLC v. 
United States, 150 Fed. Cl. 620 (2020) (citing Rev. Rul. 84-85, 1984-1 
C.B. 10; Rev. Rul. 79-98, 1979-1 C.B. 103; Rev. Rul. 76-256, 1976-2 
C.B. 46; and Rev. Rul. 76-428, 1976-2 C.B. 47), aff'd, 26 F.4th 1306 
(Fed. Cir. 2022). No one factor is dispositive.
    Determining the date on which a qualified clean hydrogen production 
facility was placed in service is inherently fact intensive, and the 
existing case law and revenue rulings are sufficient for taxpayers to 
determine their facility's placed in service date. Relying upon 
existing standards provides sufficient clarity to taxpayers and avoids 
the confusion of creating multiple placed in service standards.
    Regarding whether the final regulations should provide that the 10-
year credit period is tolled to account for circumstances beyond the 
taxpayer's control or during periods of a facility's diminished 
capacity, the 10-year credit period is a statutory requirement under 
section 45V(a)(1), and there is no provision that provides an exception 
to this statutory rule.
    Regarding whether the final regulations should clarify that a 
qualified clean hydrogen production facility cannot be placed in 
service until after December 31, 2022, the Treasury Department and the 
IRS clarify in this Summary of Comments and Explanation of Revisions 
that a qualified clean hydrogen production facility may have been 
placed in service prior to January 1, 2023. First, section 45V does not 
specify an earliest date on which a qualified clean hydrogen production 
facility must be placed in service to be eligible for the section 45V 
credit, and as explained in the Explanation of Provisions to the 
proposed regulations, the owner of a qualified clean hydrogen 
production facility originally placed in service after December 31, 
2012, can claim the section 45V credit for qualified clean hydrogen 
produced during at least some portion of the 10-year period described 
in section 45V(a)(1), provided all other requirements are met. Second, 
providing a rule that a qualified clean hydrogen production facility 
cannot be placed in service until January 1, 2023, would conflict with 
section 45V(d)(4), which provides that a facility that did not produce 
qualified clean hydrogen and that was originally placed in service 
prior to January 1, 2023, can receive a new, deemed placed in service 
date as of the date the facility is modified after December 31, 2022, 
to produce qualified clean hydrogen. If, as the comment suggests, no 
qualified clean hydrogen production facility could be placed in service 
until January 1, 2023, then existing hydrogen production facilities 
would receive a new placed in service date regardless of whether they 
meet the requirements of section 45V(d)(4), rendering section 45V(d)(4) 
superfluous. Third, under the comment's reading, no qualified clean 
hydrogen production facility could be placed in service until the 
hydrogen production and its sale or use is verified, as those are 
requirements to have qualified clean hydrogen. Verification might not 
occur until a taxable year following the year in which the hydrogen was 
produced, which would prevent the credit from being determined in the 
first taxable year of production. Fifth, the comment's reading 
conflicts with section 6417(b)(5), which makes clear that a qualified 
clean hydrogen production facility can be originally placed in service 
prior to January 1, 2023. See section 6417(b)(5) (an applicable credit 
includes ``[s]o much of the credit for production of clean hydrogen 
determined under section 45V(a) as is attributable to qualified clean 
hydrogen production facilities which are originally placed in service 
after December 31, 2012.'').
    Finally, regarding the requirements and extent to which pre-
existing facilities that were originally placed in service prior to the 
enactment of section 45V can claim the section 45V credit, for the 
reasons explained herein, this Summary of Comments and Explanation of 
Revisions clarifies that the owner of a qualified clean hydrogen 
production facility originally placed in service prior to the enactment 
of section 45V but after December 31, 2012, can claim the section 45V 
credit for the qualified clean hydrogen produced during at least some 
portion of the 10-year period described in section 45V(a)(1), provided 
all other requirements are met. Thus, owners of pre-existing facilities 
can potentially claim the section 45V credit for the remaining portion 
of the 10-year credit period. Alternatively, a pre-existing facility 
can receive a new date on which it is considered originally placed in 
service if it satisfies the requirements of Sec.  1.45V-6(a) (regarding 
the modification of an existing facility to produce qualified clean 
hydrogen) or

[[Page 2240]]

(b) (regarding the retrofitting of an existing hydrogen production 
facility).
2. Producer of Qualified Clean Hydrogen
    For purposes of section 45V(a)(1) and proposed Sec.  1.45V-1(b)(1), 
proposed Sec.  1.45V-1(b)(2) would have provided that the term 
``taxpayer'' means the taxpayer that owns the qualified clean hydrogen 
production facility at the time of the facility's production of 
qualified clean hydrogen with respect to which the section 45V credit 
is claimed, regardless of whether such taxpayer is treated as a 
producer under section 263A of the Code or under any other provision of 
law with respect to such hydrogen.
    One comment asked whether the phrase ``treated as a producer under 
section 263A'' in proposed Sec.  1.45V-1(b)(2) has the same meaning as 
``produced by the taxpayer'' under section 45X(a)(1)(A). To clarify, 
the term ``produced by the taxpayer'' as used in section 45X(a)(1)(A) 
is defined in Sec.  1.45X-1(c) and that definition does not apply for 
purposes of section 45V. Section 45X and Sec.  1.45X-1(c) address the 
production of eligible components as that term is used in section 45X, 
and not the production of hydrogen for purposes of section 45V. 
Therefore, taxpayers must determine whether they are considered the 
producer of the qualified clean hydrogen for purposes of determining 
the credit under section 45V using the definition provided in Sec.  
1.45V-1(b)(2), and not by reference to the definition of ``produced by 
the taxpayer'' under Sec.  1.45X-1(c).
    Under section 45V(a)(1) and (c)(3)(A), the taxpayer must be both 
the owner of the qualified clean hydrogen production facility and the 
producer of qualified clean hydrogen at the facility to be eligible for 
the section 45V credit, respectively. The intent of proposed Sec.  
1.45V-1(b)(2) was to clarify that, for purposes of section 45V(a)(1) 
and Sec.  1.45V-1(b)(1), the ``taxpayer'' for these purposes is the 
owner of the qualified clean hydrogen production facility at the time 
the hydrogen is produced, regardless of whether the owner is required 
to capitalize costs under section 263A and Sec.  1.263A-2(a), which 
provide rules relating to property produced by the taxpayer. As 
explained in the Explanation of Provisions to the proposed regulations, 
the definition of ``taxpayer'' in Sec.  1.45V-1(b)(2) is intended, 
among other things, to avoid unintended consequences that could arise 
under Sec.  1.263A-2(a)(1)(ii)(A) and (B)(1) with respect to contract 
manufacturing and tolling arrangements in the context of the section 
45V credit. For example, under Sec.  1.45V-1(b)(1), an owner of a 
hydrogen production facility that enters into an arrangement with a 
third party service recipient to produce qualified clean hydrogen using 
the service recipient's raw materials and inputs in exchange for a fee 
(a toller) is considered the producer of the qualified clean hydrogen 
for purposes of section 45V regardless of whether the toller is 
required to capitalize costs of producing the qualified clean hydrogen 
under section 263A. The final regulations provide the intended 
clarification described previously in this paragraph to Sec.  1.45V-
1(b)(2).
3. Increased Credit Amount for Qualified Clean Hydrogen
    Proposed Sec.  1.45V-1(b)(3) contained a cross-reference to Sec.  
1.45V-3, which provides rules under section 45V(e) that permit the 
amount of the section 45V credit determined under section 45V(a) and 
Sec.  1.45V-1(b)(1) to be multiplied by five if certain requirements 
related to prevailing wages and apprenticeships are met.
    Several comments were received relating to the prevailing wage and 
apprenticeship requirements of section 45V(e). Rules addressing the 
prevailing wage and apprenticeship requirements of section 45V(e) are 
provided in Sec.  1.45V-3, which is not included in this rulemaking. 
See TD 9998, Increased Amounts of Credit or Deduction for Satisfying 
Certain Prevailing Wage and Registered Apprenticeship Requirements (89 
FR 53184). Accordingly, comments addressing the prevailing wage and 
apprenticeship requirements are beyond the scope of this rulemaking. 
These final regulations adopt the language in proposed Sec.  1.45V-
1(b)(3) without change.

C. Determination of Credit

    Proposed Sec.  1.45V-1(c) would have provided that, subject to any 
applicable Code sections that may limit the section 45V credit amount, 
the section 45V credit for any taxable year is determined with respect 
to the qualified clean hydrogen produced by the taxpayer during that 
taxable year, although the verification of the production and sale or 
use of such hydrogen may occur in a later taxable year. The taxpayer 
would not be eligible to claim the section 45V credit with respect to 
that hydrogen until all relevant verification requirements, and the 
verification itself, have been completed. Therefore, despite such 
verification occurring in a later taxable year, the section 45V credit 
would be properly claimed with respect to the taxable year of hydrogen 
production and subject to the general period of limitations for filing 
a claim for credit or refund. Thus, if verification occurred after the 
extended return filing due date for the taxable year in which the 
hydrogen was produced, the taxpayer would need to file an amended 
return or administrative adjustment request (AAR), as applicable, to 
claim the section 45V credit for such produced hydrogen.
    The Treasury Department and the IRS requested comments on proposed 
Sec.  1.45V-1(c), and whether taxpayers anticipated that they would be 
able to complete all the requirements for claiming the section 45V 
credit, including the requirements for verification specified in 
proposed Sec.  1.45V-5, by the extended return filing deadline for the 
taxable year of hydrogen production. Comments were also requested on 
whether alternatives existed.
    Several comments suggested alternatives to the requirement in Sec.  
1.45V-1(c) that the credit is determined in the taxable year of 
hydrogen production. Some comments expressed concern that a late 
verification report, filed after the extended return filing deadline 
for the taxable year of hydrogen production, would preclude taxpayers 
from making an elective payment under section 6417 or transfer election 
under section 6418, as the necessary elections under those statutes 
cannot be made on an amended return or AAR. See sections 6417(d)(3) and 
6418(e)(1).
    One comment recommended that taxpayers be allowed to claim the 
section 45V credit initially without a verification report, then once 
the verification report for the relevant taxable year is eventually 
submitted, the credit amount is ``trued up,'' with either the 
government or the taxpayer remitting funds to reflect the verified 
emissions rate and amount of production. Some comments requested 
taxpayers be allowed to make or change an election under section 6417 
or 6418 on an amended return or AAR if they are claiming a section 45V 
credit on such amended return or AAR. Another comment proposed only 
requiring verification when there has been a change in the operation of 
a taxpayer's hydrogen production facility since the last verification, 
claiming that this would reduce the risk of late verifications 
precluding monetization elections. Finally, one comment asked that 
taxpayers be allowed to claim the section 45V credit and make an 
elective payment election or transfer election prior to the formal 
completion of the verification report to avoid missing the

[[Page 2241]]

extended return filing deadline due to a late verification report.
    These final regulations do not adopt these comments suggesting 
revisions to the requirements of proposed Sec.  1.45V-1(c). First, 
based on the comments received on the timing of verification, the 
Treasury Department and the IRS anticipate that qualified verifiers 
will be able to verify a taxpayer's production and sale or use of 
hydrogen by the deadline for filing the taxpayer's Federal income tax 
return, including extensions, so there should be no issue with making a 
timely elective payment or transfer election under section 6417 or 
6418, respectively. Second, the requirement that the credit is 
determined in the taxable year of hydrogen production adheres to the 
requirement in section 45V(a)(1) that the section 45V credit for any 
taxable year is determined based on the kilograms of qualified clean 
hydrogen produced by the taxpayer during such taxable year. Providing a 
rule that the credit is determined in a year other than the taxable 
year of hydrogen production--such as the year of verification--would 
potentially create a timing mismatch between the taxable year in which 
the hydrogen is produced and creditable under section 45V(a)(1) and the 
taxable year in which the section 45V credit for such production can be 
claimed. Third, comments suggesting modifications to the rules 
regarding elective payment elections or transferability elections under 
sections 6417 and 6418, respectively, are beyond the scope of this 
rulemaking under section 45V.
    Regarding the comments recommending exceptions to the verification 
requirements or allowing taxpayers to file verification reports after 
the section 45V credit has been claimed, the requirement that the 
production and sale or use of the hydrogen be verified is statutorily 
prescribed in section 45V(c)(2)(B)(ii), so these final regulations 
adopt the language in proposed Sec.  1.45V-1(c) without change.

II. Special Rules

A. Coordination With Credit for Carbon Oxide Sequestration

    Section 45V(d)(2) provides that no section 45V credit is allowed 
for any qualified clean hydrogen produced at a facility which includes 
carbon capture equipment for which a section 45Q credit is allowed to 
any taxpayer for the taxable year or any prior taxable year.
    Proposed Sec.  1.45V-2(a) would have followed that statutory 
provision and additionally provided that if the so-called ``80/20 
Rule'' provided in Sec.  1.45Q-2(g)(5) is satisfied with respect to 
such carbon capture equipment, and no new section 45Q credit has been 
allowed to any taxpayer for such carbon capture equipment, then the 
unit of carbon capture equipment (as defined in Sec.  1.45Q-2(c)(3)) 
for which the 80/20 Rule is satisfied will not be treated as carbon 
capture equipment for which a section 45Q credit was allowed to any 
taxpayer for any prior taxable year for purposes of section 45V(d)(2) 
and proposed Sec.  1.45V-2(a).
    Further, proposed Sec.  1.45V-1(a)(7)(i) would have clarified that 
equipment (which includes carbon capture equipment) that functions 
interdependently with other components of property to produce qualified 
clean hydrogen is part of the qualified clean hydrogen production 
facility, and proposed Sec.  1.45V-1(a)(7)(ii)(B) would have clarified 
that electricity production equipment used to power the hydrogen 
production process, including any carbon capture equipment associated 
with the electricity production process, is not part of the qualified 
clean hydrogen production facility.
    Several comments requested clarification that a separate, 
independent production line containing carbon capture equipment for 
which a section 45Q credit is allowed and that is co-located with a 
hydrogen production facility at a single industrial site does not 
disqualify the hydrogen production facility from the section 45V 
credit. For example, one comment requested clarification that an 
electricity generation facility that is co-located and interconnected 
with the hydrogen production facility, and for which the section 45Q 
credit is allowed, will not disqualify the hydrogen production facility 
from the section 45V credit. Conversely, some comments recommended that 
the final regulations modify proposed Sec.  1.45V-1(a)(7)(ii)(B) to 
disallow the section 45V credit for hydrogen produced using electricity 
that was generated by an electricity generation facility for which the 
section 45Q credit is allowed.
    One comment appeared to seek clarification that ``allowed,'' with 
respect to section 45V(d)(2), means the taxpayer has claimed the 
section 45Q credit on their tax return, not merely that they are 
eligible for claiming the section 45Q credit. The same comment 
requested confirmation that a taxpayer can claim the section 45V credit 
and then claim the section 45Q credit in a later taxable year on the 
same facility.
    Finally, one comment requested an exception to section 45V(d)(2) to 
allow a taxpayer to claim both the section 45Q and section 45V credits 
on the same facility if the facility combines hydrogen and CO2 for the 
purpose of creating synthetic molecules.
    These final regulations are not modified in response to these 
comments. The final regulations are sufficiently clear that the section 
45V(d)(2) rules coordinating the section 45V credit with the section 
45Q credit for carbon oxide sequestration only apply to the qualified 
clean hydrogen production facility. The definition of ``facility'' in 
Sec.  1.45V-1(a)(7), as clarified in these final regulations and 
described in greater detail in part I.A.4 of this Summary of Comments 
and Explanation of Revisions, means all the components that function 
interdependently to produce clean hydrogen through a process that 
results in the lifecycle GHG emissions rate used to determine the 
credit, but does not include electricity production equipment used to 
power the hydrogen production process. Further, disallowing the section 
45V credit for hydrogen produced using electricity generated at a 
facility containing carbon capture equipment for which a section 45Q 
credit has been allowed would require modifying the definition of 
``facility'' at Sec.  1.45V-1(a)(7) to include electricity production 
equipment. It would also present serious horizontal equity concerns for 
hydrogen producers who co-locate with electricity generators and those 
who do not. Therefore, electricity production equipment that powers the 
hydrogen production process and contains carbon capture equipment for 
which a section 45Q credit is allowed will not disqualify the hydrogen 
production facility from the section 45V credit. Further, these final 
regulations do not modify the definition of facility in Sec.  1.45V-
1(a)(7) to address specific co-located equipment used for other 
industrial processes because creating a rule to specifically address 
such co-located equipment is not necessary nor possible, given that the 
determination will depend on the facts and circumstances of such 
equipment.
    Regarding the meaning of the term ``allowed,'' such term generally 
means that the item was claimed on the return and not challenged by the 
IRS. See generally Virginian Hotel Corp. of Lynchburg v. Helvering, 319 
U.S. 523, 526-27 (1943); Lenz v. Commissioner, 101 T.C. 260, 264-65 
(1993). The meaning of ``allowed'' is sufficiently clear as an 
established tax concept, as its definition derives from case law and 
general tax principles, and because the term ``allowed'' appears so 
frequently in the Code and its accompanying regulations.

[[Page 2242]]

    Regarding whether a taxpayer can claim a section 45Q credit in a 
subsequent taxable year, section 45V(d)(2) contains no such 
prohibition, so the statute is already sufficiently clear and does not 
need further clarification.
    Finally, regarding the comment's request for an exception to 
section 45V(d)(2) for the creation of synthetic molecules, the 
prohibition on claiming the section 45V credit on a facility for which 
a section 45Q credit has already been allowed is statutory, and the 
statute provides no such exception.
    Accordingly, these final regulations adopt Sec.  1.45V-2(a) as 
proposed.

B. Anti-Abuse Rule

    Section 45V(c)(2)(B)(i) provides, among other things, that hydrogen 
is not qualified clean hydrogen unless it is produced in the ordinary 
course of a trade or business of the taxpayer, and for sale or use.
    Section 45V(f) empowers the Secretary to issue regulations or other 
guidance to carry out the purposes of section 45V.
    Proposed Sec.  1.45V-2(b)(1) would have disallowed the section 45V 
credit where the primary purpose of the production and sale or use of 
qualified clean hydrogen was to obtain the section 45V credit in a 
manner that is wasteful. Proposed Sec.  1.45V-2(b)(1) would have 
provided as an example the production of qualified clean hydrogen that 
the taxpayer knows or has reason to know will be vented, flared, or 
used to produce hydrogen. This proposed rule is referred to as the 
``anti-abuse rule.''
    Proposed Sec.  1.45V-5(d)(1) would have provided, among other 
things, that the qualified verifier must attest that a person has sold 
or made a verifiable use of such hydrogen. Proposed Sec.  1.45V-5(d)(2) 
would have provided that a person's verifiable use of hydrogen 
undergoing verification ``does not include--(i) Use of hydrogen to 
generate electricity that is then directly or indirectly used in the 
production of more hydrogen; or (ii) venting or flaring of hydrogen.'' 
This proposed rule is referred to as the ``verifiable use rule.''
    Many comments in response to the proposed regulations made 
suggestions or asked for clarification regarding the prohibition in 
proposed Sec.  1.45V-2(b)(1) against the sale or use of hydrogen for 
the primary purpose of obtaining the section 45V credit in a wasteful 
manner, often asking that the prohibition not apply to a particular 
scenario or set of circumstances.
    Some comments recommended rules or asked for clarification 
regarding the prohibition in proposed Sec.  1.45V-2(b)(1) against 
hydrogen production that the taxpayer knows or has reason to know will 
be vented or flared. These comments noted that venting and flaring are 
often required for routine safety or maintenance purposes and contended 
that such use of venting and flaring should not disqualify facilities 
from credit eligibility. However, in order to align with the purpose of 
section 45V and safeguard against abuse, one of these comments asked 
that the Treasury Department and the IRS more clearly state that it is 
the amount of clean hydrogen sold or used, not produced, that 
ultimately determines the credit amount.
    One comment asked for explicit assurance that hydrogen produced and 
sold for use in energy storage would not run afoul of the anti-abuse 
rule when the stored energy is later used to produce hydrogen.
    Some comments suggested disallowing the section 45V credit for 
hydrogen that is produced at the same time electricity is generated 
from hydrogen-to-power equipment that is physically connected via 
pipeline.
    Some comments expressed concern that the anti-abuse rule would 
apply to certain non-abusive scenarios where hydrogen production 
facilities and hydrogen-based electricity generators operate 
concurrently but are connected to the same electric grid.
    Another comment asked for clarification that capturing excess heat 
from hydrogen production, converting that heat to electricity, and 
using that electricity to power the production process does not run 
afoul of the anti-abuse rule.
    Some comments asked for clarification that the anti-abuse rule does 
not apply to instances where produced hydrogen, in some cases from 
process waste streams, is used to power the production facility, 
resulting in lower emissions than would otherwise be achieved.
    One comment suggested that the anti-abuse rule should not consider 
the cost of producing qualified clean hydrogen in relation to the 
amount of the section 45V credit because doing so would disincentivize 
development of cost-efficient hydrogen production technologies.
    The Treasury Department and the IRS agree that clarification of the 
anti-abuse rule is appropriate. The DOE has advised that venting of 
hydrogen downstream of a hydrogen production facility is a standard 
industry practice where necessary for safety or maintenance reasons. 
The DOE has also advised that, in the future, flaring of hydrogen that 
would otherwise have been vented could become standard industry 
practice to mitigate the environmental impacts of venting. Further, the 
DOE has advised that concurrent operation of hydrogen production and 
power generation within the same energy storage system and at the same 
time may be wasteful if no measures are taken to mitigate or reduce the 
production and consumption of the hydrogen at the same time; for 
example, if an electrolytic hydrogen production facility as standard 
practice is producing hydrogen at the same time as the produced 
hydrogen is being used to produce electricity. However, the Treasury 
Department and the IRS clarify here that the anti-abuse rule is not 
meant to apply to the use of hydrogen to store energy for later 
conversion to electricity and sale to a regional electricity grid, when 
a buyer from the grid uses such electricity to produce hydrogen.
    Accordingly, these final regulations clarify that the section 45V 
credit is not allowable if the primary purpose of the sale or use 
(rather than the production and sale or use) of qualified clean 
hydrogen is to obtain the benefit of the section 45V credit in a manner 
that is wasteful. Additionally, these final regulations clarify that 
the taxpayer obtains the section 45V credit in a wasteful manner if the 
taxpayer sells qualified clean hydrogen that the taxpayer knows or has 
reason to know will be vented, flared, used to produce heat or power 
that is then directly used to produce hydrogen, or otherwise used to 
produce hydrogen, in excess of standard commercial practices. Hydrogen 
is used to produce power that is then directly used to produce hydrogen 
if the hydrogen production facility exclusively uses such power to 
produce hydrogen or is treated as using the power produced by the 
electricity generating facility using the hydrogen and such use is 
verified by the acquisition and retirement of qualifying EACs. Hydrogen 
is not used to produce power that is then directly used to produce 
hydrogen if the power produced using hydrogen is merely supplied to the 
same electricity grid from which the hydrogen production facility draws 
power. Proposed Sec.  1.45V-2(b)(1) is further modified to provide that 
venting or flaring for safety or maintenance reasons in the ordinary 
course of business is a non-abusive commercial industry practice. 
Consistent with the comment asking for clarity that it is the amount of 
clean hydrogen sold or used, not produced, that ultimately determines 
the credit amount, Sec.  1.45V-2(b) of the final

[[Page 2243]]

regulations adds that, while not abusive, such venting or flaring is 
also not a verifiable use under Sec.  1.45V-5(d)(2), and therefore any 
such hydrogen that is vented or flared for safety reasons is not 
eligible for the section 45V credit. Finally, these final regulations 
modify the example in Sec.  1.45V-2(b)(2) (where qualified clean 
hydrogen is sold to obtain the benefit of the section 45V credit in a 
manner that is wasteful and thus not eligible for the section 45V 
credit) to reflect that the hydrogen in that example will be vented or 
flared in excess of standard commercial practices and add an example in 
Sec.  1.45V-5(d) to illustrate the verifiable use rule in the context 
of a facility's use of its own hydrogen within its hydrogen production 
process, flaring of hydrogen for testing and maintenance, and waste 
heat recovery.
    Finally, the Treasury Department and the IRS disagree with the 
comment's request that the anti-abuse rule be revised to not consider 
the cost of producing qualified clean hydrogen relative to the amount 
of the section 45V credit. The cost of hydrogen production relative to 
the amount of the section 45V credit is just one of many factors 
considered in the example provided in Sec.  1.45V-2(b)(2). Whether a 
particular taxpayer's hydrogen production activities violate the anti-
abuse rule will depend on all relevant facts and circumstances, and no 
one factor is controlling. Because the cost of hydrogen production 
relative to the value of the credit is not the only relevant factor, 
the Treasury Department and the IRS do not anticipate that including it 
within the example will deter investment in cost-efficient 
technologies.
    A few comments asked that the anti-abuse rule be significantly 
pared back or removed altogether. One comment argued that the anti-
abuse rule's prohibition of a wasteful primary purpose has no basis in 
the statute and is too broad to be authorized by the ``ordinary course 
of a trade or business of the taxpayer'' requirement of section 
45V(c)(2)(B)(i)(II). The same comment proposed revising the anti-abuse 
rule to disallow the section 45V credit only where the taxpayer's sole 
purpose is to obtain the credit in a wasteful manner.
    The same comment asserted that the anti-abuse rule exacerbates 
uncertainty by requiring that the rules of section 45V and the section 
45V regulations be applied in a manner consistent with the purposes of 
section 45V and the section 45V regulations, while section 45V only 
authorizes regulations that carry out the purposes of the statute. The 
comment further argued that the primary purpose examples of wasteful 
``production of qualified clean hydrogen that the taxpayer knows or has 
reason to know will be vented, flared, or used to produce hydrogen'' 
have no foundation in the statute. The comment asked for clarification 
whether a producer having a disqualifying purpose at the time of 
production or sale is sufficient to disallow the credit under proposed 
Sec.  1.45V-2(b)(1), or if a disqualifying purpose at production and 
sale is required. The comment suggested that the example at proposed 
Sec.  1.45V-2(b)(2) seems to indicate that a disqualifying purpose at 
the time of sale is sufficient to disallow the credit, while proposed 
Sec.  1.45V-2(b)(1) seems to indicate that a producer must have a 
disqualifying purpose at production and sale for the credit to be 
disallowed.
    First, the argument that section 45V provides no basis to support 
the prohibition of a wasteful primary purpose through an anti-abuse 
rule is mistaken because (1) the ``for sale or use'' requirement is 
plainly a purpose requirement, and the anti-abuse rule implements that 
purpose requirement; in other words, Congress did not intend that a 
nominal sale or use for purposes of generating credit claims would 
entitle taxpayers to the credit, but rather intended that only a sale 
or use possessing some degree of business purpose or economic effect 
would suffice; (2) likewise, the ``in the ordinary course of a trade or 
business of the taxpayer'' requirement justifies an anti-abuse rule 
since any activity with a primary purpose of wastefully obtaining a tax 
credit is not within the ordinary course of a trade or business; and 
(3) section 45V(f) authorizes the promulgation of regulations ``to 
carry out the purposes of this section'' and the obvious purpose of 
Congress to increase the supply of clean hydrogen in the United States 
would be undermined if credit claimants were not required to make their 
hydrogen reasonably available to legitimate hydrogen consumers. 
Hydrogen that is not so available cannot affect hydrogen supply.
    Second, regarding the comment's objection to the proposed anti-
abuse rule's requirement that the rules of section 45V and its 
regulations must be applied consistently with the purposes of the 
regulations, these final regulations do not modify the language in the 
proposed regulations. The section 45V regulations implement the section 
45V statute. Therefore, taxpayers must apply the regulations 
consistently with the purposes of both the statute and its implementing 
regulations.
    Third, the request that the proposed anti-abuse rule be modified to 
only disallow the section 45V credit where the taxpayer's ``sole 
purpose'' is to obtain the credit in a wasteful manner is problematic. 
The ``primary purpose'' requirement is the appropriate standard, 
because a sole purpose requirement could allow hydrogen producers to 
argue entitlement to claim the credit when nearly all their output is 
knowingly wasted while asserting there is some legitimate use for the 
small remainder thereof.
    Fourth, the Treasury Department and the IRS agree that a 
discrepancy exists between the text of the proposed regulations and the 
example that would have followed regarding whether a wasteful primary 
purpose at the time of production or sale or use is sufficient to 
disallow the credit under proposed Sec.  1.45V-2(b)(1), or if a 
disqualifying purpose at production and sale or use is required. 
Accordingly, these final regulations adopt proposed Sec.  1.45V-2(b) 
with modifications to the rule and the example in order to clarify that 
only a sale or use with the primary purpose of obtaining the benefit of 
the section 45V credit in a wasteful manner is sufficient to disallow 
the credit under Sec.  1.45V-2(b)(1). Note, the requirements of Sec.  
1.45V-2(b)(1) are independent of the excessive payment rules provided 
in Sec.  1.6417-6 and the excessive credit transfer rules provided in 
Sec.  1.6418-5. Taxpayers making the election under section 6417 or 
6418 must separately meet the requirements provided in Sec. Sec.  
1.6417-6 and 1.6418-5.

C. Recordkeeping

    Section 6001 provides, among other things, that (1) every person 
liable for tax under the Code shall keep such records as the Secretary 
may from time to time prescribe; and (2) whenever the Secretary deems 
it necessary, she may require any person, by regulations, to keep such 
records as she deems sufficient to show whether or not such person is 
liable for tax under the Code.
    Section 45V(e)(5) provides that the Secretary shall issue such 
regulations or other guidance as she determines necessary to carry out 
the purposes of section 45V(e), including regulations or other guidance 
which provides recordkeeping or information reporting requirements for 
purposes of administering the requirements of section 45V(e).
    Proposed Sec.  1.45V-2(c) would have provided recordkeeping 
requirements for all taxpayers claiming the section 45V credit, 
including requirements related to the section 45V(e) increased credit 
amount. No comments addressed this provision. Proposed Sec.  1.45V-2(c) 
is therefore adopted as proposed.

[[Page 2244]]

III. Procedures for Determining Lifecycle Greenhouse Gas Emissions 
Rates for Qualified Clean Hydrogen

A. In General

    Proposed Sec.  1.45V-4(a) would have provided that the amount of 
the section 45V credit is determined under section 45V(a) and proposed 
Sec.  1.45V-1(b) based upon the lifecycle GHG emissions rate of all 
hydrogen produced at a qualified clean hydrogen production facility (as 
defined in proposed Sec.  1.45V-1(a)(10)) during the taxable year. This 
determination would be required to be made following the close of such 
taxable year and must include all hydrogen production from the year. 
See proposed Sec.  1.45V-4(b). Further, proposed Sec.  1.45V-4(a) would 
have provided that the lifecycle GHG emissions rate for purposes of 
section 45V is determined under the most recent GREET model (as defined 
in proposed Sec.  1.45V-1(a)(8)(ii)). Finally, proposed Sec.  1.45V-
4(a) would have provided that in the case of any hydrogen for which a 
lifecycle GHG emissions rate has not been determined under the most 
recent GREET model for purposes of section 45V, a taxpayer producing 
such hydrogen would be permitted to file a petition for a provisional 
emissions rate (PER) with the Secretary for a determination of the 
lifecycle GHG emissions rate with respect to such hydrogen.
    Some comments supported the proposed requirement that taxpayers 
calculate the lifecycle GHG emissions rate of hydrogen produced at a 
hydrogen production facility based on the aggregate amount of hydrogen 
produced at the facility over the taxable year (that is, annual 
emissions averaging). These comments claimed that annual emissions 
averaging is more straightforward and less administratively burdensome 
than alternative methods. The comments also claimed that annual 
emissions averaging is less prone to being manipulated because it takes 
into consideration all hydrogen produced by the taxpayer over the 
taxable year. The comments appeared to suggest that sub-annual 
emissions averaging, where taxpayers could potentially select certain 
sub-annual periods of clean hydrogen production to offset other sub-
annual periods of hydrogen production that would not otherwise meet the 
lifecycle GHG emissions levels required by section 45V, is inconsistent 
with section 45V. Finally, some comments argued that annual emissions 
averaging is more aligned with the capabilities of 45VH2-GREET and 
therefore would help to facilitate compliance.
    In contrast, other comments requested that hydrogen producers be 
permitted to calculate the lifecycle GHG emissions rate of hydrogen 
produced at their facility on a more granular basis, suggesting changes 
to the definition of ``emissions through the point of production (well-
to-gate)'' in proposed Sec.  1.45V-1(a)(8)(iii). Comments maintained 
that determining the lifecycle GHG emissions rate for all hydrogen 
produced at a given hydrogen production facility during a taxable year 
is burdensome for taxpayers and creates uncertainty and risk. Some 
comments requested that lifecycle GHG emissions be permitted to be 
calculated on an hourly basis, including in the case of hydrogen 
produced using electricity, and in particular once the qualifying EAC 
requirements require temporal matching on an hourly basis (see part 
III.D.3.c of this Summary of Comments and Explanation of Revisions). 
Without calculation of lifecycle GHG emissions on an hourly basis, 
according to these comments, hours of hydrogen production that do not 
have corresponding hourly EACs could increase the lifecycle GHG 
emissions rate of all hydrogen produced for the year--even hydrogen 
produced using electricity represented by a corresponding hourly EAC--
which would be contrary to the hourly matching principle. These 
comments note the variability of certain renewable or zero-emissions 
energy sources and the limited ability of hydrogen production 
facilities to quickly ramp up and down due to technical and economic 
reasons. Still, other comments requested that lifecycle GHG emissions 
be permitted to be calculated on a kilogram-by-kilogram basis, or by 
batching kilograms of hydrogen into distinct groups, to ensure a more 
precise determination of a facility's lifecycle GHG emissions rate. One 
comment requested that, for facilities placed in service before 2028, 
the credit be determined with respect to the specific volumes of 
hydrogen that meet the temporal matching EAC requirements of proposed 
Sec.  1.45V-4(d)(3)(ii) rather than according to the average lifecycle 
GHG emissions rate of all hydrogen produced at a qualified clean 
hydrogen production facility on an annual basis.
    The Treasury Department and the IRS disagree with eliminating the 
requirement that, in general, the lifecycle GHG emissions of a hydrogen 
production process be calculated on an annual basis. Section 
211(o)(1)(H) of the Clean Air Act defines ``lifecycle GHG emissions'' 
as the aggregate quantity of GHG emissions (including direct emissions 
and significant indirect emissions such as significant emissions from 
land use changes), as determined by the EPA. Determining the lifecycle 
GHG emissions rate of a hydrogen production process, therefore, 
requires taking the ``aggregate'' quantity of emissions from a hydrogen 
production process over the course of the taxable year to derive a 
single emissions rate. This is consistent with the determination of the 
section 45V credit on an annual basis. Section 45V(a)(1) provides that 
``the clean hydrogen production credit for any taxable year is an 
amount equal to the product of the kilograms of qualified clean 
hydrogen produced by the taxpayer during such taxable year'' (emphasis 
added). Calculating lifecycle GHG emissions for a hydrogen production 
process on an annual basis, therefore, aligns with the manner in which 
the section 45V credit is determined.
    The Treasury Department and the IRS clarify that such annual 
determination is made separately for each hydrogen production process 
conducted at a hydrogen production facility during the taxable year. As 
a result, hydrogen producers will be able to claim higher credit 
amounts for producing qualified clean hydrogen using lower-emitting 
hydrogen production processes during the year, such as by using 
feedstocks with lower carbon intensities. For further discussion on 
process, see part I.A.7 of this Summary of Comments and Explanation of 
Revisions (explaining that production using each type of primary 
feedstock is considered a separate production process).
    However, once hourly matching is required for qualifying EACs, 
hydrogen produced through a process that uses electricity may be at 
risk of not qualifying for the section 45V credit at an expected amount 
if a small number of hours are not covered by the acquisition and 
retirement of qualifying EACs, which could occur as a result of 
unforeseeable circumstances beyond a taxpayer's control.
    Further, if a taxpayer believes it is infeasible to secure EACs 
from renewable or zero-emissions sources for every hour or a 
significant share of hours in a taxable year, then calculating 
lifecycle GHG emissions on an annual basis may cause such taxpayer to 
have no incentive to produce qualified clean hydrogen or qualified 
clean hydrogen in the lowest lifecycle GHG emissions tier. This is 
inconsistent with the purposes of section 45V, which includes 
encouraging the production of qualified clean hydrogen (with a higher 
credit amount for hydrogen with lower lifecycle GHG emissions rates) 
and

[[Page 2245]]

investments in hydrogen production facilities and processes that 
produce qualified clean hydrogen.
    Section 1.45V-4(a)(2) of these final regulations provides a method 
to mitigate the risk associated with potential limitations in the 
supply of qualifying EACs, coupled with a guardrail to limit 
availability of this election to processes in which the taxpayer is 
producing qualified clean hydrogen, calculated on an annual basis. 
Specifically, proposed Sec.  1.45V-4(a) is modified to provide that, 
solely for purposes of determining the lifecycle GHG emissions 
associated with a hydrogen production facility's use of electricity 
generated on or after January 1, 2030, to produce hydrogen, such 
emissions may be determined on an hourly basis. If a taxpayer utilizes 
this method, it must determine all emissions from the facility's use of 
electricity for the taxable year on an hourly basis. On or after 
January 1, 2030, when hourly matching is required, a facility's 
lifecycle GHG emissions from electricity for that hour will reflect the 
attributes of the qualifying EAC acquired and retired for that hour. In 
the case of electricity use as part of the hydrogen production process 
for which the taxpayer does not acquire and retire a qualifying EAC 
that reflects a specific hour in which such electricity was generated 
on or after January 1, 2030, the electricity emissions for that hour is 
determined by assuming that the facility is sourcing power with 
emissions equal to the default electricity emissions intensity within 
the regional electricity grid. The January 2025 version of the 45VH2-
GREET User Manual provides further information on how such hourly 
accounting may be conducted in 45VH2-GREET. These final regulations add 
Sec.  1.45V-4(a)(3)(i) and (ii) to provide examples illustrating the 
calculation of the lifecycle GHG emissions rate of the process used to 
produce hydrogen at a qualified clean hydrogen production facility, 
determined on an annual and an hourly basis, respectively.
    This method is provided pursuant to the authority in section 45V(f) 
to ``issue regulations or other guidance to carry out the purposes of 
[section 45V].'' With respect to a facility's use of electricity in a 
hydrogen production process (including a facility that produces 
hydrogen through electrolysis, which is a single hydrogen production 
process), these final regulations modify the proposed rules to further 
incentivize the production of clean hydrogen in light of the temporal 
matching requirement provided in Sec.  1.45V-4(d)(3)(ii). In 
particular, once the qualifying EAC requirements require temporal 
matching on an hourly basis, in the case of hydrogen produced using 
electricity that is represented by a qualifying EAC, a taxpayer who 
owns a facility that produces hydrogen through a process that results 
in annual emissions not greater than 4 kilograms of CO2e per kilogram 
of hydrogen can elect to determine the emissions associated with the 
electricity used in that process on an hourly basis. This method would 
enable hydrogen producers to mitigate the risk that limited 
availability of qualifying EACs could adversely affect eligibility for 
the section 45V credit for all hydrogen from a single process.
    This method is available only if the process for which an election 
is made achieves an annual lifecycle GHG emissions rate of not greater 
than 4 kilograms of CO2e per kilogram of hydrogen for all hydrogen 
produced pursuant to that process during the taxable year. This 
guardrail advances the purposes of section 45V because it provides 
added flexibility and risk mitigation only in circumstances where the 
hydrogen production process produces hydrogen that, over the course of 
the year, meets the definition of qualified clean hydrogen on an annual 
basis. In the absence of this condition, allowing the lifecycle GHG 
emissions associated with electricity used in a hydrogen production 
process to be determined on an hourly basis could encourage the 
production of hydrogen through processes that do not meet the emissions 
requirements of section 45V, contrary to the statute and the purpose of 
section 45V.

B. Use of 45VH2-GREET

    Proposed Sec.  1.45V-4(b) would have provided procedures to 
calculate the lifecycle GHG emissions rate of hydrogen produced at a 
hydrogen production facility using the most recent GREET model as 
defined in proposed Sec.  1.45V-1(a)(8)(ii) (referring to 45VH2-GREET). 
Proposed Sec.  1.45V-4(b) would have further provided that for each 
taxable year during the period described in section 45V(a)(1), a 
taxpayer claiming the section 45V credit determines the lifecycle GHG 
emissions rate of hydrogen produced at a hydrogen production facility 
within the interface of 45VH2-GREET.
    The 45VH2-GREET User Manual released in conjunction with the 
proposed regulations provided that 45VH2-GREET is expected to be 
updated on at least a yearly basis. Moreover, it mentioned that these 
updates are expected to include representations of additional hydrogen 
production processes and updates to background data (as supporting 
analysis is completed by the Argonne National Laboratory). This means 
that, under proposed Sec.  1.45V-4(b), use of 45VH2-GREET would result 
in taxpayers using an updated version of 45VH2-GREET each taxable year 
(insofar as such an update arises).
    Multiple comments raised concern about the requirement for 
taxpayers to use a potentially updated version of 45VH2-GREET each 
taxable year during the 10-year credit period due to uncertainty about 
whether changes to 45VH2-GREET may unexpectedly alter annual emissions 
assessments, which would directly impact the amount of the section 45V 
credit. Several comments requested that taxpayers be allowed to ``lock 
in'' the version of 45VH2-GREET that was available on the date the 
``final investment decision'' was made. Similarly, several other 
comments requested that taxpayers be allowed to use the latest version 
of 45VH2-GREET that was available on the date the hydrogen production 
facility was placed in service or the date when construction of the 
facility began (beginning of construction or BOC). Some of these 
comments further requested that taxpayers be allowed to use subsequent 
updated versions of 45VH2-GREET at their discretion. Finally, some 
comments requested that taxpayers be permitted to rely upon a single 
version of 45VH2-GREET unless and until there is a material change to 
the facility's hydrogen production process.
    In considering these comments, the Treasury Department and the IRS 
note that the statute envisions use of updated models, referencing use 
of ``the most recent'' version of GREET or a successor model. However, 
the Treasury Department and the IRS understand that taxpayers would 
benefit from having more certainty about a hydrogen production 
facility's lifecycle GHG emissions rate throughout the credit period 
for that facility, and therefore have determined that a beginning of 
construction safe harbor provision would help mitigate taxpayers' 
reasonable concern. Accordingly, the final regulations modify proposed 
Sec.  1.45V-4(b) by adding a second paragraph (Sec.  1.45V-4(b)(2)) 
giving taxpayers the option to make an election to use the version of 
45VH2-GREET that was in effect on the date when construction of their 
hydrogen production facility began for the remaining taxable years 
within the 10-year credit period.
    In the case of a facility owned by the taxpayer that began 
construction prior to December 26, 2023, Sec.  1.45V-4(b)(2) provides 
taxpayers with the option to make an election to use the first

[[Page 2246]]

publicly available version of 45VH2-GREET (that is, the version of 
45VH2-GREET released in December 2023) for the remaining taxable years 
within the 10-year credit period. This election is irrevocable, meaning 
taxpayers may not subsequently opt to use an updated version of 45VH2-
GREET once they have opted to lock-in the applicable version of 45VH2-
GREET. Section 1.45V-4(b)(2)(i) of the final regulations further 
provides that, in the case of a facility that is modified to produce 
qualified clean hydrogen under section 45V(d)(4) and Sec.  1.45V-6(a), 
or a facility that is retrofitted in a manner that entitles the 
facility to a new placed in service date under Sec.  1.45V-6(b), the 
date the facility began construction is the date construction of the 
modification or retrofit began. Finally, Sec.  1.45V-4(b)(2)(ii) is 
added to provide that a taxpayer makes the election with respect to a 
qualified clean hydrogen production facility's hydrogen production 
process on Form 7210 by no later than the due date (including 
extensions) for filing the taxpayer's Federal income tax return for a 
taxable year ending no later than December 31, 2025, or for the taxable 
year in which such facility is placed in service, whichever taxable 
year is later. The election is made separately for each hydrogen 
production process (but on the same Form 7210). For purposes of 
determining BOC, taxpayers may rely upon the guidance provided in 
Notice 2022-61,\13\ as well as the guidance issued under sections 
45,\14\ 45Q,\15\ and 48.\16\ Changes have also been made to proposed 
Sec.  1.48-15(d) to provide a corresponding BOC safe harbor with 
respect to a specified clean hydrogen production facility.
---------------------------------------------------------------------------

    \13\ 2022-52 I.R.B. 560.
    \14\ See Notice 2013-29, 2013-20 I.R.B. 1085, clarified by 
Notice 2013-60, 2013-44 I.R.B. 431, then clarified and modified by 
Notice 2014-46, 2014-36 I.R.B. 520, then updated by Notice 2015-25, 
2015-13 I.R.B. 814, then clarified and modified by Notice 2016-31, 
2016-23 I.R.B. 1025, and then updated, clarified, and modified by 
Notice 2017-04, 2017-4 I.R.B. 541; Notice 2018-59, 2018-28 I.R.B. 
196, modified by Notice 2019-43, 2019-31 I.R.B. 487, then modified 
by Notice 2020-41, 2020-25 I.R.B. 954, and then clarified and 
modified by Notice 2021-5, 2021-3 I.R.B. 479, and then clarified and 
modified by Notice 2021-41, 2021-29 I.R.B. 17.
    \15\ See Notice 2020-12, 2020-11 I.R.B. 495.
    \16\ See Notice 2018-59, modified by Notice 2019-43 and by 
Notice 2020-41, and then clarified and modified by Notice 2024-41.
---------------------------------------------------------------------------

    It is appropriate to provide this safe harbor based on a facility's 
beginning of construction date because it better supports the purpose 
of taxpayer certainty than a placed in service date, and because, 
unlike a ``final investment decision'' date, the beginning of 
construction date is an established, defined concept in tax law. For 
taxpayers that elect to lock-in a version of 45VH2-GREET, these final 
regulations do not adopt the comments' suggestions that taxpayers also 
be given the option to use subsequent updated versions of 45VH2-GREET 
at their discretion. Such an option would enable taxpayers to lock-in a 
version of 45VH2-GREET while retaining the option to elect a future 
version of 45VH2-GREET that would reflect lower lifecycle GHG 
emissions, which would fail to further the purpose of this safe harbor 
to provide additional taxpayer certainty.
    In all other cases, taxpayers must use the latest version of 45VH2-
GREET that is publicly available on the first day of the taxable year 
during which the qualified clean hydrogen for which the taxpayer is 
claiming the section 45V credit was produced; or, if a version of 
45VH2-GREET becomes publicly available after the first day of the 
taxable year of production (but still within such taxable year), then 
the taxpayer may, in its discretion, treat such later version of 45VH2-
GREET as the 45VH2-GREET Model.

C. Provisional Emissions Rate (PER)

1. In General
    Proposed Sec.  1.45V-4(c)(1) would have provided that, for purposes 
of section 45V(c)(2)(C) and proposed Sec.  1.45V-4(a), the term 
``provisional emissions rate'' or ``PER'' means the lifecycle GHG 
emissions rate of the process by which qualified clean hydrogen is 
produced by the taxpayer at a qualified clean hydrogen production 
facility as determined by the Secretary under proposed Sec.  1.45V-
4(c). No comments addressed this definition, so it is adopted as 
proposed with one change made to clarify that the term ``provisional 
emissions rate'' or ``PER'' means the lifecycle GHG emissions rate of 
the hydrogen produced through a process at a hydrogen production 
facility as determined by the Secretary under Sec.  1.45V-4(c).
2. Restriction on Filing a Provisional Emissions Rate Petition
    Proposed Sec.  1.45V-4(c)(2)(i) would have provided that a taxpayer 
may not file a petition with the Secretary for a PER unless a lifecycle 
GHG emissions rate has not been determined under the most recent GREET 
model (as defined in proposed Sec.  1.45V-1(a)(8)(ii) as 45VH2-GREET) 
for hydrogen produced by the taxpayer at a hydrogen production 
facility. Further, proposed Sec.  1.45V-4(c)(2)(i) would have provided 
that a lifecycle GHG emissions rate has not been determined under the 
most recent GREET model with respect to hydrogen produced by the 
taxpayer at a hydrogen production facility if it uses a hydrogen 
production pathway that is not included in the most recent GREET 
model--that is, if either the feedstock used by such facility or the 
facility's hydrogen production technology is not included in the most 
recent GREET model. Proposed Sec.  1.45V-4(c)(2)(i) also would have 
provided that, if a taxpayer's request for an emissions value from the 
DOE under proposed Sec.  1.45V-4(c)(5) with respect to the hydrogen 
produced by the taxpayer at a hydrogen production facility is pending 
at the time such hydrogen production facility's pathway is included in 
an updated version of 45VH2-GREET, then the taxpayer's request for an 
emissions value will automatically be denied.
    Some comments, despite proposed Sec.  1.45V-4(c)(2)(i), and in 
disagreement with its restriction on filing a PER petition, sought to 
clarify that a taxpayer using a hydrogen production pathway included in 
45VH2-GREET may nevertheless file a PER petition because they have 
independently verifiable data that differs from the background data 
used by 45VH2-GREET. Many of these comments challenged the 
appropriateness of the background data used by 45VH2-GREET, claiming 
that they do not reflect the actual values of such parameters and that 
more accurate measurements of such parameters can be reliably obtained 
by taxpayers. These comments therefore requested that taxpayers be 
allowed to file a PER petition after challenging these assumptions 
through the EVRP, because using actual values would likely result in a 
lower and more accurate emissions rate.
    The parameters in 45VH2-GREET have been deemed background data if 
independent verification of bespoke values for individual facilities is 
expected to be infeasible with reasonable fidelity. The Treasury 
Department and the IRS recognize that the capabilities of verification 
resources are evolving, and the DOE is continuously monitoring the 
availability of robust data and verification methods for both 
background and foreground data parameters in 45VH2-GREET. For example, 
as described in part III.E of this Summary of Comments and Explanation 
of Revisions, an upcoming release of 45VH2-GREET will include upstream 
methane loss rates as foreground data once enhanced GHG reporting to 
the EPA is available and other program integrity measures are fully 
implemented. Once a parameter becomes foreground data in 45VH2-GREET, 
taxpayers may treat that

[[Page 2247]]

parameter as foreground data in their emissions value request 
application (through an EVRP in support of the PER process). Allowing 
taxpayers to provide their own values for background data would run 
counter to the rationale for determining that a given parameter is 
background data. The Treasury Department and the IRS note that allowing 
taxpayers to challenge background data through the EVRP likely would 
significantly increase the number of emissions value request 
applications, resulting in substantial administrative burden and 
administrability concerns for the DOE, and potentially far slower 
reviews for all interested taxpayers. Therefore, these final 
regulations do not allow taxpayers to avail themselves of the PER 
petition process if their hydrogen production pathway (which consists 
of the combination of production technology and input feedstock 
materials and sources) is included in 45VH2-GREET regardless of any 
disagreement with the background assumptions.
    Several comments also raised concerns about the treatment of novel 
variations of hydrogen production pathways that currently are 
represented in 45VH2-GREET, claiming that the model does not provide 
the correct emissions value for their variation. These comments asked 
that the final regulations modify proposed Sec.  1.45V-4(c)(2)(i) to 
state explicitly that taxpayers may use the PER process for novel 
variations of existing pathways. These final regulations do not adopt 
these comments. Since the original version of 45VH2-GREET and 
supporting documentation were published, the DOE has updated the model 
and the 45VH2-GREET User Manual to include specific definitions of the 
feedstocks and technologies represented in the model. Taxpayers who 
have developed a novel variation of a hydrogen production pathway may 
use the PER process if their pathway does not meet the definitions of 
the feedstocks and technologies represented in the 45VH2-GREET Model. 
The text of Sec.  1.45V-4(c)(2)(i) and the definitions in the 45VH2-
GREET User Manual provide sufficient information to taxpayers to 
determine whether their pathway qualifies for the PER process.
    Several comments asked to streamline the process for petitioning 
for a PER for RNG feedstocks derived from non-landfill sources (for 
example, food waste, animal waste, and biogas derived from renewable 
diesel or sustainable aviation fuel production), claiming that these 
sources make up 30 percent of North American RNG production. It is not 
clear whether these comments, in requesting to streamline the process 
for petitioning for a PER, are asking the Treasury Department and the 
IRS to allow these taxpayers to participate in the PER process 
altogether or whether they are requesting the Treasury Department and 
the IRS create a separate, streamlined PER petition process for 
taxpayers who plan to produce hydrogen using non-landfill RNG. To the 
extent that the comments ask for the former, as stated above, taxpayers 
may petition the Secretary for a PER if either the feedstock used by 
their facility or the facility's hydrogen production technology is not 
included in 45VH2-GREET. Moreover, it is anticipated that some non-
landfill RNG hydrogen production processes (such as from livestock 
manure) will be added to 45VH2-GREET in 2025, in a manner that is 
consistent with these final regulations. To the extent that the 
comments ask for a separate, streamlined PER process, these final 
regulations do not adopt this request as it is not consistent with the 
statutory purposes of section 45V to offer preferential treatment to 
any group of feedstocks.
    Lastly, one comment asked that the Treasury Department and the IRS 
decline to issue a PER for taxpayers using geologic hydrogen until more 
robust climate and environmental data is available. The Treasury 
Department and the IRS are aware that emissions analysis of newer 
methods of hydrogen production, such as geologic hydrogen, is subject 
to technical uncertainty. The DOE intends to address these 
uncertainties by engaging with applicants during the EVRP and through 
independent research. The DOE intends to issue emissions values only 
when an analysis has been completed robustly addressing these 
uncertainties, and to an extent comparable to other uncertainties 
within 45VH2-GREET. Applicants to the PER process will additionally be 
subject to the independent verification requirements of proposed Sec.  
1.45V-5, which will help ensure the key sources of greenhouse gases are 
reflected in the lifecycle analysis of a given facility. Given these 
safeguards, the Treasury Department and the IRS clarify in this Summary 
of Comments and Explanation of Revisions to these final regulations 
that PERs may be used for any hydrogen production pathway (meaning a 
specific technology and input feedstock materials and sources) not 
included in the 45VH2-GREET Model, including geologic hydrogen. No 
further clarification in the regulatory text is needed; therefore, 
these final regulations adopt proposed Sec.  1.45V-4(c)(2)(i) with 
conforming changes made to confirm that the Secretary has designated 
45VH2-GREET as a successor model.
    Proposed Sec.  1.45V-4(c)(2)(ii) would have specified that, 
notwithstanding proposed Sec.  1.45V-1(a)(8)(ii), for the taxable year 
in which the hydrogen production pathway the taxpayer uses to produce 
hydrogen at a qualified clean hydrogen production facility is first 
included in an updated version of 45VH2-GREET, the updated version of 
45VH2-GREET will be considered the most recent GREET model with respect 
to the hydrogen produced by the taxpayer at the hydrogen production 
facility. No comments addressed this provision. It is adopted as 
proposed with changes made to confirm that the Secretary has designated 
45VH2-GREET as a successor model and to clarify that, for purposes of 
the PER process, the lifecycle GHG emissions rate of the hydrogen 
produced at a hydrogen production facility is made with respect to 
hydrogen produced through a process.
3. Process for Filing a Provisional Emissions Rate Petition
    Proposed Sec.  1.45V-4(c)(3) would have provided that a taxpayer 
petitions the Secretary for a PER by attaching a PER petition to its 
Federal income tax return for the first taxable year of hydrogen 
production ending within the 10-year period described in section 
45V(a)(1) for which the taxpayer claims the section 45V credit for 
hydrogen to which the PER petition relates and for which a lifecycle 
GHG emissions rate has not been determined, as defined under proposed 
Sec.  1.45V-4(c)(2)(i). Proposed Sec.  1.45V-4(c)(3) would have 
provided that a PER petition must contain (i) an emissions value 
obtained from the DOE setting forth the DOE's analytical assessment of 
the lifecycle GHG emissions associated with the facility's hydrogen 
production pathway, and (ii) a copy of the taxpayer's request to the 
DOE for an emissions value, including any information that the taxpayer 
provided to the DOE pursuant to the emissions value request process 
specified in proposed Sec.  1.45V-4(c)(5).
    The Treasury Department and the IRS understand that this filing 
requirement may mean that a taxpayer must attach voluminous documents 
to its return, which may cause tax administration issues. For effective 
tax administration, the Treasury Department and the IRS have modified 
this provision to state that a PER petition must contain (i) the letter 
received from the DOE stating the emissions value the DOE determined 
with respect to the facility's hydrogen

[[Page 2248]]

production pathway, and (ii) the DOE control number assigned to the 
emissions value request of the taxpayer. This information will be 
sufficient for the Treasury Department and the IRS to be able to 
request additional information from the taxpayer, as necessary.
    Proposed Sec.  1.45V-4(c)(3) would have further provided that, if 
the taxpayer obtained more than one emissions value from the DOE, then 
the PER petition must contain the emissions value setting forth the 
lifecycle GHG emissions rate of the hydrogen for which the section 45V 
credit is claimed on the Form 7210 to which the PER petition is 
attached. No comments were received on this provision and it is adopted 
as proposed with amendments to reflect the new requirements for what a 
PER petition must contain and to clarify that the taxpayer attaches the 
PER petition to its Federal income tax return or information return.
4. Provisional Emissions Rate Determination
    Proposed Sec.  1.45V-4(c)(4) would have provided that upon the 
IRS's acceptance of the taxpayer's Federal income tax return or 
information return containing a PER petition, the emissions value 
specified on such PER petition will be deemed accepted. Proposed Sec.  
1.45V-4(c)(4) would have provided that a taxpayer would be able to rely 
upon an emissions value provided by the DOE for purposes of calculating 
and claiming a section 45V credit, provided that any information, 
representations, or other data provided to the DOE in support of the 
request for an emissions value are accurate. Proposed Sec.  1.45V-
4(c)(4) also would have provided that the IRS's deemed acceptance of 
such emissions value is the Secretary's determination of the PER. 
Proposed Sec.  1.45V-4(c)(4) would have stated, however, that the 
production and sale or use of such hydrogen must be verified by an 
unrelated party under section 45V(c)(2)(B)(ii) and in compliance with 
the procedures provided in proposed Sec.  1.45V-5. Proposed Sec.  
1.45V-4(c)(4) would have stated that such verification and any 
information, representations, or other data provided to the DOE in 
support of the request for an emissions value are subject to later 
examination by the IRS. No comments were received on this provision. 
This provision is adopted as proposed with a clarification to Sec.  
1.45V-4(c)(4) to clarify that the emissions value is deemed accepted 
upon the taxpayer's filing of its Federal income tax return (or 
information return), and to clarify that the production, including the 
data the taxpayer submitted in the PER petition and the data provided 
to the DOE in support of the taxpayer's EVRP application, and sale or 
use of the hydrogen must be verified under Sec.  1.45V-5.
5. Department of Energy Emissions Value Request Process
    Proposed Sec.  1.45V-4(c)(5) would have provided that, in order to 
obtain an emissions value, an applicant must submit a request for an 
emissions value following procedures specified by the DOE. The DOE 
opened the EVRP to the public on September 30, 2024.
    Proposed Sec.  1.45V-4(c)(5) also would have provided that 
emissions values will be evaluated using the same well-to-gate system 
boundary that is employed in 45VH2-GREET, as proposed in Sec.  1.45V-
1(a)(8)(iii). Additionally, proposed Sec.  1.45V-4(c)(5) would have 
provided that, if applicable, background data parameters in 45VH2-GREET 
would be treated as background data (with fixed values that an 
applicant cannot change) in the EVRP. The EVRP would be subject to any 
guidance issued under section 45V, including any guidance related to 
the use of EACs.
    Proposed Sec.  1.45V-4(c)(5) would have further provided that an 
applicant may request an emissions value from the DOE only after a 
front-end engineering and design (FEED) study or similar indication of 
project maturity, such as project specification and cost estimation 
sufficient to inform a final investment decision, has been completed 
for the hydrogen production facility. Additionally, proposed Sec.  
1.45V-4(c)(5) would have provided that the DOE may decline to review 
applications that are not responsive, including those applications that 
use a hydrogen production technology and feedstock already in 45VH2-
GREET or applications that are incomplete. Guidance and procedures for 
applicants to request and obtain an emissions value from the DOE are 
published by the DOE on its 45V Emissions Value Request application 
page, which may be found at <a href="https://www.energy.gov/eere/45v-emissions-value-request">https://www.energy.gov/eere/45v-emissions-value-request</a>.
    In the Explanation of Provisions to the proposed regulations, the 
Treasury Department and the IRS requested comments on the appropriate 
indicators of project readiness that should be in place before an 
applicant requests an emissions value to ensure that requests 
correspond to hydrogen production facilities with significant 
commercial interest, and standards against which these indicators could 
be measured.
    The Treasury Department and the IRS received many comments in 
response to that request for comments. The comments questioned the FEED 
study requirement, claiming that these studies are costly and create 
uncertainty in investment decisions. The comments claimed that a key 
economic factor in justifying the cost of a FEED study is the amount of 
section 45V credit a project can claim, and estimating the credit 
without the emissions value is not feasible. The comments further 
claimed that the level of project maturity required for a FEED study 
necessitates a substantial amount of capital investment, which creates 
uncertainty because taxpayers would be taking a risk that their 
substantial investment may be frustrated by a higher-than-expected 
emissions value and thus a lower section 45V credit. Instead of 
requiring a FEED study, the comments suggested a variety of 
alternatives: (i) a front-end loading (FEL-2) level feasibility study, 
coupled with a detailed financial model and a lifecycle GHG emissions 
analysis prepared by a qualified party; (ii) sufficient engineering 
definition to produce a Class 4 cost estimate, as defined by the 
Association for the Advancement of Cost Engineering (AACE) 
International Recommended Practice No. 18R-97; and (iii) exemption from 
this requirement for certain pathways.
    At this nascent stage of the EVRP and after consultation with the 
DOE, these final regulations retain the requirement for a FEED study 
but clarify that a taxpayer only needs a Class 3 FEED study or similar 
indication of project maturity, as determined by the DOE, to apply for 
an emissions value. Class 3 FEED studies reflect more mature projects 
than FEED studies of Class 4 or 5, making them more likely to be robust 
and therefore likely to facilitate faster reviews. Class 3 FEED studies 
can be conducted sooner in a project and are generally less detailed or 
time-consuming than a Class 1 or 2 FEED study, addressing the comments' 
concerns on cost. Further, the DOE advised that Class 3 FEED studies 
are likely to be conducted by a majority of developers of hydrogen 
production facilities across pathways, given how complex and capital 
intensive these facilities are. However, the DOE will continue to 
explore the feasibility of alternatives to a Class 3 FEED study (for 
example, a FEED study of a different class) and may identify such 
alternatives in the future. To the extent the DOE determines that a 
similar indicator of project maturity would satisfy the requirements of 
Sec.  1.45V-4(c)(5), such determination will be published by the DOE on 
its 45V

[[Page 2249]]

Emissions Value Request application page. Thus, the provision is 
adopted as proposed with changes made to clarify that a taxpayer may 
apply for an emissions value only after it has completed a Class 3 FEED 
study or other indication of project maturity, as determined by the 
DOE. The receipt of an emissions value, however, does not constitute a 
determination that all other requirements for claiming the section 45V 
credit, including compliance with the anti-abuse and verifiable use 
rules, are met.
    The Treasury Department and the IRS also received many comments on 
the EVRP generally. Some of these comments requested that the Treasury 
Department and the IRS (in conjunction with the DOE) create an appeals 
process through which an applicant can challenge their emissions value. 
A few comments requested that applicants be allowed to revise or 
supplement their emissions value request application at various stages 
of the application process. Some comments requested that the DOE allow 
applicants with multiple facilities to apply for one emissions value. 
And other comments asked that applicants be able to submit various 
documents in support of their applications (for example, submitting 
documents obtained using modeling software or the R&D GREET model).
    The DOE has not developed an appeals process or a method for an 
applicant to unilaterally revise or supplement their application. 
However, an applicant may submit additional information to the DOE 
before the DOE has completed its analysis or after it has determined 
the facility's emissions value. These final regulations provide that 
applicants seeking a new emissions value after the DOE has completed 
its analysis may reapply only if they wish to resubmit their 
application with new or revised technical information or clarifications 
related to the information previously submitted. If the applicant's 
resubmissions result in the applicant receiving multiple emissions 
values from the DOE for a given hydrogen production pathway, the 
applicant should use the value that aligns with the information the 
applicant provided to the DOE with respect to the facility's operations 
in support of the application that resulted in the emissions value used 
The DOE will evaluate emissions value request applications using 
information provided by applicants coupled with background data in 
45VH2-GREET (for example, grid emissions, upstream methane emissions). 
If background data in 45VH2-GREET evolve, information in the latest 
version of 45VH2-GREET will be used. As new background data parameters 
are added to 45VH2-GREET or existing parameters become disaggregated 
(for example, if regionalized upstream methane parameters are 
incorporated in lieu of a national average), the DOE may revise the 
information requested through the EVRP to be consistent with the 
information required to run 45VH2-GREET. For example, if 45VH2-GREET is 
modified to include regional upstream methane background assumptions, 
and to require users to select the region that their natural gas is 
sourced from, applicants to the EVRP will also be expected to provide 
information about the region their natural gas is sourced from and will 
be evaluated using the same regional upstream methane background 
assumptions.
    Some comments expressed concern about the timing and transparency 
of the EVRP. Regarding timing, the comments expressed concern that 
submitted requests would have long processing times and that could 
affect project funding and create delays. These comments suggested that 
the DOE impose on itself a time limit to process applications, after 
which time an applicant's emissions value is deemed to be the value 
determined by the lifecycle GHG emissions analysis attached to their 
tax return.
    The DOE has advised that it endeavors to review requests as quickly 
as possible. A provision to impose a time limit on the DOE's 
consideration of emissions value requests could impede an accurate and 
rigorous review of the requests and would require additional 
administrative processes. Additionally, because the IRS deems as 
accepted the emissions value provided by the DOE upon filing, and such 
deemed acceptance is the Secretary's determination of the PER as 
provided in proposed Sec.  1.45V-4(c)(4), an accurate and rigorous 
review is necessary to such a determination. Regarding transparency, 
the DOE has stated publicly in the Emissions Value Request Application 
Instructions the variables that drive the timeline for application 
review, which include the volume of applications around a given 
pathway, complexity/ease of evaluating the hydrogen production pathway, 
and the commercial readiness of the pathway. The DOE has advised that 
it expects to be able to provide additional transparency regarding the 
timeline required for application review. Any additional information 
will be published by the DOE on its 45V Emissions Value Request page.
6. Effect of Provisional Emissions Rate
    Proposed Sec.  1.45V-4(c)(6) would have provided that a taxpayer 
may use a PER determined by the Secretary to calculate the amount of 
the clean hydrogen production credit under section 45V(a) and proposed 
Sec.  1.45V-1(b) with respect to qualified clean hydrogen produced by 
the taxpayer at a qualified clean hydrogen production facility 
beginning with the first taxable year in which a PER determined by the 
Secretary has been obtained and for any subsequent taxable year during 
the 10-year period beginning on the date such facility was originally 
placed in service, provided all othe

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This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.