Notice2022-13983

Public Company Accounting Oversight Board; Notice of Filing of Proposed Rules on Planning and Supervision of Audits Involving Other Auditors and Dividing Responsibility for the Audit With Another Accounting Firm

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Published
July 1, 2022

Issuing agencies

Securities and Exchange Commission

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[Federal Register Volume 87, Number 126 (Friday, July 1, 2022)]
[Notices]
[Pages 39680-39731]
From the Federal Register Online via the Government Publishing Office [<a href="http://www.gpo.gov">www.gpo.gov</a>]
[FR Doc No: 2022-13983]



[[Page 39679]]

Vol. 87

Friday,

No. 126

July 1, 2022

Part III





Securities and Exchange Commission





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Public Company Accounting Oversight Board; Notice of Filing of Proposed 
Rules on Planning and Supervision of Audits Involving Other Auditors 
and Dividing Responsibility for the Audit With Another Accounting Firm; 
Notice

Federal Register / Vol. 87 , No. 126 / Friday, July 1, 2022 / 
Notices

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SECURITIES AND EXCHANGE COMMISSION

[Release No. 34-95159; File No. PCAOB-2022-01]


Public Company Accounting Oversight Board; Notice of Filing of 
Proposed Rules on Planning and Supervision of Audits Involving Other 
Auditors and Dividing Responsibility for the Audit With Another 
Accounting Firm

June 24, 2022.
    Pursuant to Section 107(b) of the Sarbanes-Oxley Act of 2002 
(``Act''), notice is hereby given that on June 24, 2022, the Public 
Company Accounting Oversight Board (the ``Board'' or the ``PCAOB'') 
filed with the Securities and Exchange Commission (the ``Commission'' 
or the ``SEC'') the proposed rules described in items I and II below, 
which items have been prepared by the Board. The Commission is 
publishing this notice to solicit comments on the proposed rules from 
interested persons.

I. Board's Statement of the Terms of Substance of the Proposed Rules

    On June 21, 2022, the Board adopted ``Planning and Supervision of 
Audits Involving Other Auditors and Dividing Responsibility for the 
Audit with Another Accounting Firm'' and related amendments to its 
auditing standards, attestation standards, auditing interpretations, 
rules, and a form (collectively, the ``proposed rules''). The text of 
the proposed rules appears in Exhibit A to the SEC Filing Form 19b-4 
and is available on the Board's website at <a href="https://pcaobus.org/about/rules-rulemaking/rulemaking-dockets/docket-042-proposed-amendments-relating-to-the-supervision-of-audits-involving-other-auditors-and-proposed-auditing-standard">https://pcaobus.org/about/rules-rulemaking/rulemaking-dockets/docket-042-proposed-amendments-relating-to-the-supervision-of-audits-involving-other-auditors-and-proposed-auditing-standard</a> and at the Commission's Public Reference 
Room.

II. Board's Statement of the Purpose of, and Statutory Basis for, the 
Proposed Rules

    In its filing with the Commission, the Board included statements 
concerning the purpose of, and basis for, the proposed rules and 
discussed any comments it received on the proposed rules. The text of 
these statements may be examined at the places specified in Item IV 
below. The Board has prepared summaries, set forth in sections A, B, 
and C below, of the most significant aspects of such statements. In 
addition, the Board is requesting that the Commission approve the 
proposed rules, pursuant to Section 103(a)(3)(C) of the Act, for 
application to audits of emerging growth companies (``EGCs''), as that 
term is defined in Section 3(a)(80) of the Securities Exchange Act of 
1934 (``Exchange Act''). The Board's request is set forth in section D.

A. Board's Statement of the Purpose of, and Statutory Basis for, the 
Proposed Rules

(1) Purpose
Summary
    The Board has adopted amendments to its auditing standards to 
strengthen requirements for planning and supervising audits involving 
accounting firms and individual accountants (collectively, ``other 
auditors'') outside the accounting firm that issues the auditor's 
report (the ``lead auditor''). In these audits, the lead auditor issues 
the audit report on the company's consolidated financial statements, 
but other auditors often perform important work on the audit. The roles 
of other auditors have increased as companies' global operations have 
grown. In addition, the Board adopted a new auditing standard that will 
apply when the lead auditor divides responsibility for an audit with 
another accounting firm (``referred-to auditor'').
    Working with other auditors and referred-to auditors can differ 
from working with people in the same firm, creating challenges in 
coordination and communication. These challenges can lead to 
misunderstandings about the nature, timing, and extent of their work 
and can reduce audit quality. It is important for investor protection 
that the lead auditor adequately plan and supervise the work of other 
auditors so that the audit is performed in accordance with PCAOB 
standards and provides sufficient appropriate evidence to support the 
lead auditor's opinion in the audit report.
    This rulemaking is intended to increase and improve the lead 
auditor's involvement in and evaluation of the other auditors' work. 
The Board believed that the heightened attention to other auditors' 
work will improve communication among auditors and the lead auditor's 
ability to prevent or detect deficiencies in that work, and thus 
enhance the quality of audits involving other auditors and promote 
investor protection.
    The amendments to the Board's auditing standards are intended to 
improve PCAOB standards principally by (i) applying a risk-based 
supervisory approach to the lead auditor's oversight of other auditors 
and (ii) requiring that the lead auditor perform certain procedures 
when planning and supervising an audit that involves other auditors. 
The amendments have taken into account recent practice developments in 
the lead auditor's oversight of other auditors' work, including the 
greater use of communication technology. In brief, the amendments:
    <bullet> Require that the engagement partner determine whether his 
or her firm's participation in the audit is sufficient for the firm to 
carry out the responsibilities of a lead auditor and report as such. 
The amendments also provide considerations for the engagement partner 
to use in making this determination and require that the audit's 
engagement quality reviewer review the determination.
    <bullet> Require that the lead auditor, when determining the 
engagement's compliance with independence and ethics requirements, 
understand the other auditors' knowledge of those requirements and 
experience in applying them. The amendments also require that the lead 
auditor obtain and review written affirmations regarding the other 
auditors' policies and procedures related to those requirements and 
regarding compliance with the requirements, and a description of 
certain auditor-client relationships related to independence. In 
addition, the amendments require the sharing of information about 
changes in circumstances and the updating of affirmations and 
descriptions in light of those changes.
    <bullet> Require that the lead auditor understand the knowledge, 
skill, and ability of other auditors' engagement team members who 
assist the lead auditor with planning and supervision, and obtain a 
written affirmation from other auditors that their engagement team 
members possess the knowledge, skill, and ability to perform assigned 
tasks.
    <bullet> Require that the lead auditor supervise other auditors 
under the Board's standard on audit supervision and inform other 
auditors about the scope of their work, identified risks of material 
misstatement, and certain other key matters. The amendments also 
require that the lead auditor and other auditors communicate about the 
audit procedures to be performed, and any changes needed to the 
procedures. In addition, the amendments require the lead auditor to 
obtain and review written affirmations from other auditors about their 
performance of work in accordance with the lead auditor's instructions, 
and to direct other auditors to provide certain documentation about 
their work.
    <bullet> Provide that, in multi-tiered audits, a first other 
auditor may assist the lead auditor in performing certain required

[[Page 39681]]

procedures with respect to second other auditors.
    This rulemaking rescinds an interim standard but carries forward 
and strengthens some of its requirements in a new standard that applies 
to those infrequent situations where the lead auditor divides 
responsibility for a portion of the audit with another audit firm and 
therefore does not supervise the work performed by that firm. In these 
situations, the lead auditor refers in the audit report to the work of 
that auditor (i.e., a referred-to auditor). This new standard requires 
that in these situations the lead auditor determine that audit 
procedures were performed regarding the consolidation or combination of 
financial statements of the business units audited by the referred-to 
auditor into the company's financial statements. The standard also 
requires that the lead auditor obtain the referred-to auditor's written 
representation that it is independent and duly licensed to practice, 
and that the lead auditor disclose in the audit report the magnitude of 
the portion of the financial statements and, if applicable, internal 
controls audited by the referred-to auditor.
    The Board has adopted the amendments and new standard after three 
rounds of public comment. Commenters generally expressed support for 
the rulemaking's objective of improving the quality of audits involving 
other auditors and referred-to auditors. They also suggested ways to 
revise or clarify the proposed amendments and standard. The Board took 
into account these comments, as well as observations of the Board and 
its staff through PCAOB oversight activities (including audit 
inspections and enforcement cases).
    The amendments and new standard apply to all audits conducted under 
PCAOB standards. Subject to approval by the Securities and Exchange 
Commission (``SEC'' or ``Commission''), the amendments and new standard 
will take effect for audits for fiscal years ending on or after 
December 15, 2024.
(b) Statutory Basis
    The statutory basis for the proposed rules is Title I of the Act.

B. Board's Statement on Burden on Competition

    Not applicable. The Board's consideration of economic impacts of 
the proposed rules is discussed in section D below.

C. Board's Statement on Comments on the Proposed Rules Received From 
Members, Participants or Others

    The Board released the proposed rule amendment for public comment 
in PCAOB Release No. 2016-002 (Apr. 12, 2016). The Board received 23 
written comment letters on that release. The Board issued a 
supplemental request for public comment in PCAOB Release No. 2017-005 
(Sept. 26, 2017). The Board received 22 written comment letters on that 
release. The Board issued a second supplemental request for public 
comment in PCAOB Release No. 2021-005 (Sept. 28, 2021). The Board 
received 19 written comment letters on that release. The Board has 
carefully considered all comments received. The Board's response to the 
comments it received and the changes made to the proposed rules in 
response to the comments received are discussed below.
Background
    This rulemaking addresses the responsibilities of the lead auditor 
(i.e., the audit firm that issues the auditor's report) in planning and 
supervising an audit that involves the work of other auditors. In 
formulating the approach, the Board sought public comment several 
times. In April 2016, the Board issued a proposal (``2016 Proposal'') 
to amend our auditing standards and issue a new standard, to strengthen 
the requirements for lead auditors in audits that involve other 
auditors and referred-to auditors.\1\ In September 2017, after 
considering public comments on the 2016 Proposal, the Board issued a 
supplemental request for comment (``2017 SRC'') on certain targeted 
revisions to the proposed amendments.\2\ In September 2021, after 
considering the public comments on the prior releases, the Board issued 
a second supplemental request for comment (``2021 SRC'') to seek 
additional public comment on certain revisions to the amendments and 
other matters.\3\
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    \1\ Proposed Amendments Relating to the Supervision of Audits 
Involving Other Auditors and Proposed Auditing Standard--Dividing 
Responsibility for the Audit with Another Accounting Firm, PCAOB 
Release No. 2016-002 (Apr. 12, 2016).
    \2\ Supplemental Request for Comment: Proposed Amendments 
Relating to the Supervision of Audits Involving Other Auditors and 
Proposed Auditing Standard--Dividing Responsibility for the Audit 
with Another Accounting Firm, PCAOB Release No. 2017-005 (Sept. 26, 
2017).
    \3\ Second Supplemental Request for Comment: Proposed Amendments 
Relating to the Supervision of Audits Involving Other Auditors and 
Proposed Auditing Standard--Dividing Responsibility for the Audit 
with Another Accounting Firm, PCAOB Release No. 2021-005 (Sept. 28, 
2021).
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    Commenters on the 2016 Proposal, 2017 SRC, and 2021 SRC 
(collectively, the ``proposing releases'') generally expressed support 
for the rulemaking's objective of improving the quality of audits 
involving other auditors and referred-to auditors. They also suggested 
ways to revise or clarify the proposed amendments and standard. The 
Board considered all of the comments and adopted the amendments and 
standard (collectively ``amendments'' or ``final amendments'') for the 
reasons discussed below.
Rulemaking History
    In the 2016 Proposal, the Board proposed to amend PCAOB auditing 
standards to strengthen existing requirements and impose a more uniform 
approach to the lead auditor's supervision of other auditors.\4\ The 
proposed amendments were intended to increase the lead auditor's 
involvement in, and evaluation of, the work of other auditors, enhance 
the ability of the lead auditor to prevent or detect deficiencies in 
the work of other auditors, and facilitate improvements in the quality 
of the work of other auditors. The proposed amendments also included a 
proposed new standard that would apply when the lead auditor divides 
responsibility for a portion of the audit with another accounting firm 
and refers to the referred-to auditor's report in the lead auditor's 
report. The Board received 23 comment letters on the 2016 Proposal.\5\ 
Commenters generally expressed support for the rulemaking's objective 
of improving the quality of audits involving other auditors and 
referred-to auditors. Some expressed concerns or requested 
clarification about certain proposed requirements.
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    \4\ See 2016 Proposal at Section II.
    \5\ See 2017 SRC at 6-7 (discussing comment letters received on 
the 2016 Proposal).
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    In response to the input from commenters, the Board issued a 
supplemental request for comment on the 2016 Proposal in September 
2017.\6\ The 2017 SRC discussed significant comments received and 
presented revisions to the proposed amendments while leaving the 
overall proposed approach to the supervision of other auditors intact. 
The Board received 22 comment letters on the 2017 SRC.\7\ Commenters 
generally expressed continued support for the project's objectives, and 
a number of commenters also suggested changes to, or requested 
clarification or guidance on, certain proposed requirements.
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    \6\ 2017 SRC.
    \7\ See 2021 SRC at 7 (discussing comment letters received on 
the 2017 SRC).
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    After consideration of the comments on the 2017 SRC and further 
analysis of issues raised by commenters and

[[Page 39682]]

developments in this area, the Board issued a second supplemental 
request for comment in September 2021. The proposed revisions in the 
2021 SRC were designed to adjust certain requirements to better take 
into account the lead auditor's role in the audit, address certain 
scenarios encountered in practice, revise certain proposed definitions 
to reflect recent amendments to the Board's standards, and improve the 
readability of the amended standards. The Board received 19 comment 
letters on the 2021 SRC. Commenters continued to generally express 
support for the project's objectives, and also suggested some changes 
to, or requested clarification or guidance on, certain proposed 
requirements. The Board has considered the comments on the 2021 SRC, as 
well as on the previous proposing releases, in developing the final 
amendments.\8\ The Board has also considered the observations of the 
Board and its staff from PCAOB oversight activities.
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    \8\ The comment letters received on the 2016 Proposal, 2017 SRC, 
and 2021 SRC are available in the docket for this rulemaking on the 
PCAOB's website (<a href="https://pcaobus.org/Rulemaking/Pages/Docket042Comments.aspx">https://pcaobus.org/Rulemaking/Pages/Docket042Comments.aspx</a>).
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Overview of Existing Requirements
    This section discusses key provisions of existing PCAOB auditing 
standards that address lead auditor responsibilities involving the work 
of other auditors or referred-to auditors that participate in an audit. 
Depending on the circumstances of an audit involving other auditors, 
one of two standards applies, as described below.
    In 2003, the Board adopted the standard known today as AS 1205, 
Part of the Audit Performed by Other Independent Auditors (at that 
time, AU sec. 543), when it adopted the auditing profession's standards 
then in existence.\9\ AS 1205 imposes requirements on a lead auditor 
(or ``principal auditor,'' in the terminology of AS 1205) that uses the 
work and reports of other independent auditors that have audited the 
financial statements of one or more subsidiaries, divisions, branches, 
components, or investments included in the financial statements audited 
by the lead auditor. These requirements relate to situations in which 
the lead auditor uses the work and reports of other auditors or 
referred-to auditors by (i) assuming responsibility for the other 
auditors' work or (ii) dividing responsibility for the audit with 
referred-to auditors and referring to their work and reports in the 
lead auditor's audit report.\10\ Those ``divided-responsibility'' 
situations, as discussed below, are relatively uncommon.
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    \9\ In 1963, the American Institute of Certified Public 
Accountants (``AICPA'') issued a codification of auditing standards 
that included several paragraphs on using the work of other auditors 
or referred-to auditors. In 1971, the AICPA issued Statement on 
Auditing Procedure No. 45, Using the Work and Reports of Other 
Auditors, and in 1972 it codified the standard in section 543 of the 
Statement on Auditing Standards No. 1 (AU sec. 543). In 2003, the 
PCAOB adopted the auditing profession's standards in existence at 
that time, including AU sec. 543. See Establishment of Interim 
Professional Auditing Standards, PCAOB Release No. 2003-006 (Apr. 
18, 2003). In 2015, the PCAOB reorganized its auditing standards 
using a topical structure and a single, integrated numbering system. 
See Reorganization of PCAOB Auditing Standards and Related 
Amendments to PCAOB Standards and Rules, PCAOB Release No. 2015-002 
(Mar. 31, 2015). As part of that rulemaking, AU sec. 543 was 
reorganized as AS 1205. The reorganization did not impose additional 
requirements on auditors or substantively change the requirements of 
that standard.
    \10\ For example, the lead auditor may divide responsibility for 
a portion of the audit with another firm if it is impracticable for 
the lead auditor to review the other firm's work. See AS 1205.06.
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    In 2010, the Board adopted AS 1201, Supervision of the Audit 
Engagement (at that time, Auditing Standard No. 10), when it adopted 
eight new auditing standards that set forth the auditor's 
responsibilities for assessing and responding to risk in an audit.\11\ 
AS 1201 governs the supervision of the audit engagement, including 
supervising the work of engagement team members outside the engagement 
partner's firm. Under existing PCAOB standards, the lead auditor 
supervises the work of another auditor under AS 1201 in situations not 
covered by AS 1205.\12\
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    \11\ Auditing Standards Related to the Auditor's Assessment of 
and Response to Risk and Related Amendments to PCAOB Standards, 
PCAOB Release No. 2010-004 (Aug. 5, 2010). Among other things, these 
risk assessment standards established risk-based requirements for 
determining the necessary audit work in multi-location audit 
engagements.
    \12\ See second note to AS 1205.01.
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    Figure 1 illustrates an example of a U.S.-based audit that involves 
other accounting firms, and the PCAOB auditing standards that apply to 
the audit. In the example, Accounting Firm 1 is the lead auditor, and 
it involves Accounting Firm 2 by either (A) assuming responsibility for 
the work and reports of Accounting Firm 2 in accordance with AS 1205, 
or (B) supervising the work of Accounting Firm 2 in accordance with AS 
1201. The lead auditor (C) divides responsibility for part of the audit 
with Accounting Firm 3 in accordance with AS 1205 and refers to 
Accounting Firm 3 in the lead auditor's audit report on the 
consolidated financial statements.

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[GRAPHIC] [TIFF OMITTED] TN01JY22.001

    The following discusses AS 1205 and AS 1201 in more detail:
    (A) Using the work and reports of other auditors under AS 1205. If 
an auditor uses, and assumes responsibility for, the work and reports 
of other auditors that audited the financial statements of one or more 
subsidiaries, divisions, branches, components, or investments included 
in the financial statements presented, AS 1205 includes the following 
requirements:\13\
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    \13\ In addition, in situations governed by AS 1205, the lead 
auditor is required by the Board's standard on planning, AS 2101, 
Audit Planning, to perform procedures to determine the locations or 
business units at which audit procedures should be performed. See AS 
2101.11-.13. This also applies to situations in which the auditor 
divides responsibility with another accounting firm. See AS 2101.14.
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    <bullet> When significant parts of the audit are performed by other 
auditors (from the same network of firms as the lead auditor or outside 
the network), the auditor is required to decide whether its own 
participation in the audit is sufficient to enable it to serve as the 
lead auditor (or, in the language of AS 1205, the ``principal 
auditor'') and to report as lead auditor on the company's consolidated 
financial statements.\14\
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    \14\ See AS 1205.02.
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    <bullet> Whether or not the lead auditor decides to make reference 
to the audit of the other auditor, the lead auditor is required to make 
inquiries about the professional reputation and independence of the 
other auditor.\15\ In addition, the lead auditor is required to adopt 
appropriate measures to assure the coordination of its activities with 
those of the other auditor in order to achieve a proper review of the 
matters affecting the consolidating or combining of accounts in the 
financial statements. Those measures may include procedures to 
ascertain through communication with the other auditor:
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    \15\ AS 1205.10.
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    <bullet> That the other auditor is aware that the financial 
statements of the component which it is to audit are to be included in 
the financial statements on which the lead auditor will report, and 
that the other auditor's report will be relied upon (and, where 
applicable, referred to) by the lead auditor;
    <bullet> That the other auditor is familiar with the accounting 
principles generally accepted in the United States and with the 
standards of the PCAOB, and will conduct its audit and issue its report 
in accordance with those standards;
    <bullet> That the other auditor has knowledge of the SEC's 
financial reporting requirements; and
    <bullet> That a review will be made of matters affecting 
elimination of intercompany transactions and accounts and, if 
appropriate, the uniformity of accounting practices among the 
components included in the financial statements.\16\
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    \16\ AS 1205.10.c.
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    <bullet> The lead auditor must obtain, review, and retain certain 
information from the other auditor before issuing the report, including 
an engagement completion document, a list of significant risks, the 
other auditor's responses to those risks, the results of the other 
auditor's related procedures, and significant deficiencies and material

[[Page 39684]]

weaknesses in internal control over financial reporting.\17\
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    \17\ AS 1205.12.
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    <bullet> The lead auditor also should \18\ consider performing one 
or more of the following procedures: visiting the other auditor, 
reviewing the audit programs of the other auditor (and, in some cases, 
issuing instructions to the other auditor), and reviewing additional 
audit documentation of significant findings or issues in the engagement 
completion document.\19\
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    \18\ The word ``should,'' as used in the auditing and related 
professional practice standards, indicates responsibilities that are 
presumptively mandatory. See Paragraph (a)(2) of PCAOB Rule 3101, 
Certain Terms Used in Auditing and Related Professional Practice 
Standards. Rule 3101 also defines other terms, such as ``must'' and 
``may,'' that describe the degree of responsibility that the 
standards impose on auditors.
    \19\ AS 1205.12.
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    (B) Including the other auditors in the engagement team and 
supervising their work under AS 1201. This standard governs the 
auditor's supervision of an audit engagement, including the work of 
other auditors who are members of the same engagement team, wherever 
they are located. AS 1201, as it relates to the supervision of other 
auditors on the engagement team, includes the following requirements:
    <bullet> The engagement partner is responsible for the engagement 
and its performance.\20\ The engagement partner may seek assistance 
from appropriate engagement team members in fulfilling his or her 
responsibilities for the engagement and its performance.\21\ Engagement 
team members can be from the engagement partner's firm or outside the 
firm.
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    \20\ AS 1201.03.
    \21\ AS 1201.04.
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    <bullet> The engagement partner and others who assist the 
engagement partner in supervising the work of other engagement team 
members are required to:
    <bullet> Inform the engagement team members of their 
responsibilities for the work they are to perform, including the 
objective of the procedures they are to perform, the nature, timing, 
and extent of those procedures, and matters that could affect those 
procedures;
    <bullet> Direct the engagement team members to inform the 
engagement partner or supervisors of significant accounting and 
auditing issues arising during the audit; and
    <bullet> Review the work of engagement team members to evaluate 
whether the work was performed and documented, the objectives of the 
procedures were achieved, and the results of the work support the 
conclusions reached.\22\
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    \22\ AS 1201.05.
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    <bullet> The engagement partner and others who assist the 
engagement partner in supervising the audit should determine the extent 
of supervision necessary for engagement team members to perform their 
work as directed and form appropriate conclusions. Under this standard, 
requirements for supervision are risk-based and scalable, and the 
necessary extent of supervision varies depending on, for example, the 
nature of the assigned work, the risks of material misstatement 
associated with that work, and the knowledge, skill, and ability of 
each individual involved.\23\
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    \23\ AS 1201.06.
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    (C) Dividing responsibility for the audit with another accounting 
firm. AS 1205 also governs audits in which the lead auditor divides 
responsibility for the audit with another accounting firm that issues a 
separate auditor's report on the financial statements of one or more 
subsidiaries, divisions, branches, components, or investments included 
in the company's financial statements.\24\ The requirements of AS 1205 
that apply under these circumstances are more limited than the 
requirements that apply to the lead auditor's use of the work and 
reports of other auditors when the lead auditor assumes responsibility 
for the other auditor's work (discussed in item A above).\25\ For 
example, AS 1205 does not require the lead auditor to obtain, review, 
and retain certain information from the accounting firm with which the 
lead auditor divides responsibility for the audit (which is required 
when the lead auditor assumes responsibility for another firm's work 
under AS 1205).\26\ If the lead auditor refers in its report to the 
work of another firm, the lead auditor's report indicates the division 
of responsibility and the magnitude of the portion of the financial 
statements audited by the other firm.\27\
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    \24\ For auditors' reports on non-issuer entities, where the 
principal accountant elects to place reliance on the work of the 
other accountant and makes reference to that effect in the auditor's 
report, SEC rules require that the other accounting firm's report be 
filed with the SEC. See Rule 2-05 of Regulation S-X, 17 CFR 210.2-
05.
    \25\ AS 1205.06-.09.
    \26\ AS 1205.12.
    \27\ AS 1205.07-.09.
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Existing Practice
    This section describes the state of practice--including the 
evolution of audit practices and related inspection findings--that the 
Board and its staff have observed in past years through PCAOB oversight 
activities (including through observations from audit inspections and 
enforcement cases).
Evolution of Auditing Practice at Accounting Firms
    Auditors around the world, even when they perform audit procedures 
that are required to comply with PCAOB standards, may be influenced by 
international and home country auditing standards. With respect to the 
use of other auditors, the standards of the International Auditing and 
Assurance Standards Board (``IAASB'')--specifically, International 
Standard on Auditing (``ISA'') 600 \28\--establishes requirements for 
``group audits.'' \29\ ISA 600 was originally developed in the wake of 
several significant frauds that involved multinational groups of 
companies, audited by multiple accounting firms.\30\ In December 2021, 
the IAASB approved amendments to ISA 600 in a project that was informed 
by, among other things, persistent deficiencies in group audits 
reported by the International Forum of Independent Audit Regulators 
(``IFIAR'').\31\
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    \28\ ISA 600, Special Considerations--Audits of Group Financial 
Statements (Including the Work of Component Auditors) (effective for 
audits of group financial statements for periods beginning on or 
after December 15, 2009); ISA 600 (Revised), Special 
Considerations--Audits of Group Financial Statements (Including the 
Work of Component Auditors) (effective for audits of group financial 
statements for periods beginning on or after December 15, 2023). See 
also AU-C Section 600, Special Considerations--Audits of Group 
Financial Statements (Including the Work of Component Auditors) 
(standard adopted by the AICPA's Auditing Standards Board 
(``ASB'')).
    \29\ Under ISA 600, group audits are audits of ``group financial 
statements'' consisting of at least two ``components.'' Group audits 
generally are performed by a ``group engagement team'' and one or 
more ``component auditors'' and may involve a single firm or 
multiple firms.
    \30\ See, e.g., Koninklijke Ahold N.V. (Royal Ahold), A. Michiel 
Meurs, Cees van der Hoeven, Johannes Gerhardus Andreae, and Ture 
Roland Fahlin, SEC Accounting and Auditing Enforcement Release 
(``AAER'') No. 2124 (Oct. 13, 2004); Lernout & Hauspie Speech 
Products, SEC AAER No. 1729 (Mar. 4, 2003); In re Parmalat 
Finanziara, S.p.A, SEC AAER No. 2065 (July 28, 2004); see also 
Michael J. Jones, ed., Creative Accounting, Fraud and International 
Accounting Scandals (2011) (describing, in Part B, 58 high-profile 
accounting scandals across 12 countries, including the Royal Ahold 
and Parmalat cases).
    \31\ See paragraph 7 of IAASB, Invitation to Comment, Enhancing 
Audit Quality in the Public Interest: A Focus on Professional 
Skepticism, Quality Control and Group Audits (Dec. 2015); see also 
IFIAR, 2017 Survey of Inspection Findings (Mar. 8, 2018), at 10 
(showing group audits among the inspection themes with frequent 
findings in 2014-2017); IAASB, Work Plan for 2015-2016: Enhancing 
Audit Quality and Preparing for the Future (Dec. 2014), at 7 
(``Concern [with ISA 600] has been expressed about: [t]he extent of 
the group auditor's involvement in the work of the component auditor 
. . .; [c]ommunication between the group auditor and the component 
auditor; [a]pplication of the concept of component materiality; 
[i]dentifying a component in complex situations; and [w]ork effort 
of the component auditor.'').

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[[Page 39685]]

    Meanwhile, the PCAOB has observed through its oversight activities 
that, after the PCAOB and IAASB adopted their own standards on risk 
assessment, some audit firms, particularly some of the largest firms 
that work extensively with other auditors, revised their policies, 
procedures, and guidance (``methodologies'') for using other auditors. 
The PCAOB has also observed differences among firms' methodologies, for 
example, in their approaches to determining whether the firm's 
participation in an audit is sufficient for the firm to serve as lead 
auditor.
    The PCAOB has also noted through its oversight activities that some 
audit firms have applied advances in technology to various aspects of 
the audit, including the supervision of engagement team members and 
other communications.\32\ The PCAOB has taken these practice 
developments into account in formulating the amendments.
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    \32\ See PCAOB, Spotlight: Data and Technology Research Project 
Update (May 2020), at 4-5 (noting that some firms have applied 
technology and developed tools to ``improve communications between 
the auditor and the company or among members of the engagement team 
(including other auditors), track information received during the 
audit, automate the documentation of procedures performed, and 
facilitate the efficiency of supervisory review.'').
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Observations From Audit Inspections and Enforcement Cases
    This section discusses observations based on PCAOB audit 
inspections and PCAOB and SEC enforcement cases. PCAOB staff has 
inspected the work of auditors who use other auditors, such as by 
reviewing the scope of work performed by the other auditor, the 
planning and instructions provided to the other auditor, and the degree 
of supervision (including review) of the other auditor. The PCAOB has 
also inspected the work of other auditors, such as by conducting 
inspections abroad and reviewing work performed by non-U.S. auditors at 
the request of a U.S.-based lead auditor. In some cases, PCAOB staff 
inspected the work performed by both the lead auditor and other 
auditors on the same audit. In many cases, but not always, the lead 
auditor was a U.S. firm while the other auditor was located in another 
jurisdiction. In addition, in 2019 the PCAOB established a ``target 
team'' of staff who performed inspection procedures across inspected 
firms. The team focused on U.S.-based multi-location audits and on 
issuer audits at annually inspected firms in which the U.S. firm was 
not the lead auditor.\33\
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    \33\ See PCAOB, Spotlight: Staff Update and Preview of 2019 
Inspection Observations (Oct. 8, 2020).
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Other Auditors
    PCAOB inspections staff has observed significant audit deficiencies 
in the work performed by other auditors, including noncompliance with 
the lead auditor's instructions and failure to communicate significant 
accounting and auditing issues to the lead auditor. Deficiencies have 
also been identified in other auditors' compliance with PCAOB standards 
governing a variety of audit procedures.\34\
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    \34\ See, e.g., 2016 Proposal at 16-17.
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    These failures in audit performance occurred in critical audit 
areas that are frequently selected for inspection, including revenue, 
accounts receivable, internal control over financial reporting, and 
accounting estimates including fair value measurements. For example, in 
several instances, other auditors failed to perform sufficient 
procedures in auditing the revenue of a company's business unit, 
including with respect to evaluating the business unit's revenue 
recognition policy, testing the occurrence of revenue, and testing the 
operating effectiveness of the business unit's controls over revenue. 
In recent years, there have been some indications of decreasing 
inspection-observed deficiencies, as discussed below.
    The Board in its enforcement cases has made similar findings about 
failures in audit performance. In one case, the Board found that an 
other auditor failed to perform audit procedures and to exercise 
supervisory responsibilities in accordance with PCAOB standards.\35\ In 
another case, an other auditor failed to exercise due professional care 
and failed to obtain sufficient audit evidence for the audit work on 
accounts receivable.\36\ In a more recent case, other auditors failed 
to exercise due professional care, respond adequately to a known 
significant risk, and obtain sufficient appropriate audit evidence, and 
they misrepresented their work in communications with the lead 
auditor.\37\
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    \35\ See In the Matter of Akiyo Yoshida, CPA, PCAOB Release No. 
105-2014-024 (Dec. 17, 2014). Unless otherwise indicated, the 
enforcement cases discussed in this section were settled 
proceedings.
    \36\ See In the Matter of Wander Rodrigues Teles, PCAOB Release 
No. 105-2017-007 (Mar. 20, 2017).
    \37\ See In the Matter of Ricardo Agust[iacute]n Garc[iacute]a 
Chagoy[aacute]n, Jos[eacute] Ignacio Valle Aparicio, and 
Rub[eacute]n Eduardo Guerrero Cervera, PCAOB Release No. 105-2018-
021 (Oct. 30, 2018).
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Lead Auditor
    Over the years, there have been numerous observations from 
inspections and from enforcement cases where the lead auditor failed, 
under existing PCAOB standards, to appropriately determine the 
sufficiency of its participation in an audit to warrant serving as lead 
auditor. These failures occurred at large and small firms, domestic and 
international. Among the most egregious findings, lead auditors failed 
to perform an audit or participated very little in the audit, and 
instead issued an audit report on the basis of procedures performed by 
other auditors.\38\ In these audits, the auditor failed to 
appropriately determine that it could serve as the lead auditor when 
all or a substantial portion of the financial statements were audited 
by another auditor. In two SEC enforcement cases, one firm failed to 
perform any analysis,\39\ and another firm failed to perform an 
adequate analysis,\40\ under AS 1205 regarding the sufficiency of its 
participation to serve as lead auditor.
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    \38\ For findings in PCAOB enforcement cases, see, for example, 
In the Matter of Michael T. Studer, CPA, P.C. and Michael T. Studer, 
CPA, PCAOB Release No. 105-2012-007 (Sept. 7, 2012), and In the 
Matter of Bentleys Brisbane Partnership and Robert John Forbes, CA, 
PCAOB Release No. 105-2011-007 (Dec. 20, 2011). Some of the 
standards violated in the enforcement cases cited in this release 
were predecessor standards to current PCAOB standards. The 
descriptions of inspection findings in this release are based on 
certain accounting firm inspection reports (portions of which are 
available on the PCAOB's website) and on the PCAOB's experience with 
inspecting firms.
    \39\ See BDO Canada LLP (f/k/a BDO Dunwoody LLP), SEC AAER No. 
3926 (Mar. 13, 2018).
    \40\ See KPMG Inc., SEC AAER No. 3927 (Mar. 13, 2018).
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    There also have been findings in which the lead auditor failed to 
assess, or adequately assess, the qualifications of other auditors' 
personnel who participated in the audit. For example, PCAOB oversight 
activities have revealed situations in which the other auditors' 
personnel lacked the necessary industry experience or knowledge of 
PCAOB standards and rules (including independence requirements), SEC 
rules, and the applicable financial reporting framework to perform the 
work requested by the lead auditor.\41\ Other examples identified 
through PCAOB and SEC oversight activities include audits in which: (i) 
the lead auditor failed to ascertain whether the other auditors, each 
of whom played a substantial role in the audit,\42\ were registered 
with the PCAOB; \43\ (ii) the

[[Page 39686]]

lead auditor failed to obtain, review, and retain the results of the 
other auditor's procedures relating to risks; \44\ (iii) the lead 
auditor failed to instruct the other auditor to perform an audit in 
accordance with PCAOB standards; \45\ (iv) the lead auditor failed to 
supervise the other auditors or provide specific instructions to them, 
including detailed audit plans, appropriate modifications to audit 
plans based on identified risks, the audit objectives to be 
accomplished, or the need to maintain proper documentation; \46\ (v) 
the lead auditor failed to adequately supervise the work of foreign 
audit staff in circumstances in which the engagement partner did not 
speak, read, or write the language used by the foreign staff; \47\ and 
(vi) the lead auditor failed to adequately analyze whether it could 
serve as the principal auditor, relied on the work of an other auditor 
that was not registered with the PCAOB, and failed to determine whether 
the other auditor's work complied with PCAOB auditing standards.\48\ In 
recent years, there have been indications of increased involvement by 
some firms in the supervision of other auditors, as discussed below.
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    \41\ See, e.g., In the Matter of Gregory & Associates, LLC, and 
Alan D. Gregory, CPA, PCAOB Release No. 105-2019-018 (Aug. 21, 
2019).
    \42\ See PCAOB Rule 2100, Registration Requirements for Public 
Accounting Firms (providing that any firm that plays a substantial 
role in the preparation or furnishing of an audit report with 
respect to any issuer, broker, or dealer must be registered with the 
Board); see also PCAOB Rule 1001(p)(ii), Definitions of Terms 
Employed in Rules (defining the phrase ``play a substantial role in 
the preparation or furnishing of an audit report'').
    \43\ See, e.g., BDO Canada LLP, SEC AAER No. 3926; KPMG Inc., 
SEC AAER No. 3927.
    \44\ See In the Matter of Ron Freund, CPA, PCAOB File No. 105-
2009-007 (Jan. 26, 2015), at 1 (Board order summarily affirming 
hearing officer's finding of violation and imposition of sanction) 
(finding a violation of AU 543.12b, which was reorganized by the 
PCAOB in March 2015 as AS 1205.12b, and which required that ``the 
principal auditor must obtain, and review and retain, . . . [a] list 
of significant fraud risk factors, the auditor's response, and the 
results of the auditor's related procedures . . . .'').
    \45\ See BDO Canada LLP, SEC AAER No. 3926.
    \46\ See, e.g., Anderson Bradshaw PLLC, Russell Anderson, CPA, 
Sandra Chen, CPA, and William Denney, CPA, SEC AAER No. 3856 (Jan. 
26, 2017); Sherb & Co., LLP, Steven J. Sherb, CPA, Christopher A. 
Valleau, CPA, Mark Mycio, CPA, and Steven N. Epstein, CPA, SEC AAER 
No. 3512 (Nov. 6, 2013).
    \47\ See, e.g., In the Matter of Acquavella, Chiarelli, Shuster, 
Berkower & Co., LLP, PCAOB Release No. 105-2013-010 (Nov. 21, 2013); 
In the Matter of David T. Svoboda, CPA, PCAOB Release No. 105-2013-
011 (Nov. 21, 2013).
    \48\ See In the Matter of Morgan & Company LLP, PCAOB Release 
No. 105-2021-002 (Mar. 30, 2021).
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Divided-Responsibility Audits
    As noted above, audits in which the lead auditor divides 
responsibility with one or more other accounting firms are relatively 
uncommon.\49\ For example, division of responsibility between auditors 
might occur for an equity method investment or a late-year acquisition 
of a company audited by another auditor.
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    \49\ According to PCAOB staff analysis of Form AP filings with 
the PCAOB, lead auditors currently divide responsibility with 
another auditor in about 40 issuer audits per year. Form AP filings 
in 2021, 2020, 2019, and 2018 disclosed 36, 41, 37, and 42 divided-
responsibility audits, respectively.
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Evolution of Inspection Findings
    As noted above, some firms, particularly larger firms affiliated 
with global networks, have increased their supervision of other 
auditors in light of other standards. In recent years, some larger U.S. 
firms have made further changes to their audit methodologies, perhaps 
in response to deficiencies identified by PCAOB inspections, 
enforcement cases by regulators, and ongoing rulemaking developments. 
Specifically, some firms have encouraged a greater level of supervision 
by the lead auditor, such as frequent comprehensive communications with 
other auditors and review of other auditors' work papers in the areas 
of significant risk.
    There have been some indications from PCAOB inspections that these 
firms' revisions to methodologies may have contributed to a decline in 
inspection-observed audit deficiencies at the firms' foreign affiliates 
with respect to work performed at the lead auditor's request.\50\ In 
2014, for example, PCAOB inspections staff observed a decrease in the 
number of significant audit deficiencies in work performed by other 
auditors.\51\ Since 2014, the rate of deficiencies has fluctuated but 
remained below the 2013 level. Thus, the changes to the methodologies 
of some firms appear to have contributed to some improvements in the 
quality of audits.
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    \50\ For data regarding deficiencies in audits that involve 
other auditors, see discussion below.
    \51\ See PCAOB, Staff Inspection Brief: Information about 2017 
Inspections, Vol. 2017/3 (Aug. 2017), at 7. The observed decrease is 
in comparison to the rate of deficiencies in certain inspected work 
in 2011, 2012, and 2013, when inspections staff, in each year 
respectively, identified significant audit deficiencies in about 32, 
38, and 42 percent of the inspected work performed for lead auditors 
by non-U.S. members of the six largest global networks. See Audit 
Committee Dialogue, PCAOB Release No. 2015-003 (May 7, 2015), at 9 
(graph entitled ``Deficiencies in Non-U.S. Referred Work''). Because 
issuer audit engagements and aspects of those engagements are 
selected for inspection based on a number of risk-related and other 
factors, the deficiencies included in inspections reports are not 
necessarily representative of the inspected firms' issuer audit 
engagement practice.
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    In 2019, some of the Board's inspections focused on certain topics 
in audits involving other auditors, including planning and risk 
assessment, determining the appropriateness of serving as lead auditor, 
and communications between the lead auditor and other auditors. The 
inspectors observed improved audit quality when the lead auditor and 
other auditors communicated regularly and consistently. They also 
observed areas for improvement, including the documentation of required 
procedures, reporting of certain audit participants, and compliance 
with independence requirements.\52\
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    \52\ See PCAOB, Spotlight: Staff Update and Preview of 2019 
Inspection Observations (Oct. 8, 2020), at 5-6.
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Reasons To Improve Auditing Standards
    The increasing globalization of business, especially among large 
public companies, has led to expanded use of other auditors and 
increasingly significant roles for other auditors within the audit. 
When other auditors participate in an audit, it is important for 
investor protection that the engagement partner and, in turn, lead 
auditor assure that the audit is performed in accordance with PCAOB 
standards and that sufficient appropriate evidence is obtained through 
the combined work of the lead auditor and other auditors to support the 
lead auditor's opinion in the audit report on the company's 
consolidated financial statements. Among other things, this means that 
the lead auditor should be appropriately involved in the audit so that 
the work of all audit participants is properly planned and supervised, 
the results of the work are properly evaluated, and the lead auditor is 
in a position to conclude that the financial statements are presented 
fairly in all material respects. Lack of adequate lead auditor planning 
or supervision can result in deficient audits.
    As noted above, some firms have made changes to their audit 
methodologies regarding the use of other auditors. However, other firms 
that have not made significant improvements to their methodologies 
concerning the planning and supervision of audits involving other 
auditors may have greater risk of lower quality audits when they use 
other auditors.
    Additionally, observations from PCAOB oversight activities indicate 
that further improvements are needed. PCAOB staff continues to identify 
deficiencies in the work of other auditors in critical audit areas, 
deficiencies that lead auditors had not identified or sufficiently 
addressed. In some cases, these deficiencies occurred even when lead 
auditors did not violate existing requirements related to the use of 
other auditors, for example, if the lead auditor performed the 
procedures described in AS 1205 but did not identify these 
deficiencies. Such findings indicate that investor protection could be 
improved by, among

[[Page 39687]]

other things, increased involvement in, and evaluation of, the work of 
other auditors by the lead auditor.
Areas for Improvement
    To enhance audit practice among all firms using other auditors, the 
Board identified the following areas for improvement in the current 
standards:
    <bullet> Applying a risk-based supervisory approach. Applying a 
risk-based supervisory approach to the lead auditor's oversight of 
other auditors' work should result in more appropriate involvement by 
the lead auditor in audits involving other auditors. Unlike the Board's 
standards for determining the scope of multi-location audit engagements 
and general supervision of the audit, which require more audit 
attention to areas of greater risk, the existing standard for using the 
work of other auditors does not explicitly require the lead auditor to 
tailor its planning and oversight of other auditors for the associated 
risks. Applying a risk-based supervisory approach will direct the lead 
auditor's attention to the areas of greatest risk.
    <bullet> Providing additional specificity. Providing additional 
specificity for the lead auditor's application of the principles-based 
supervisory requirements of PCAOB standards to the supervision of other 
auditors should help address the unique aspects of supervising other 
auditors. Additional specificity should also help the lead auditor 
assure that its participation in the audit is sufficient for it to 
carry out its responsibilities and issue an audit report based on 
sufficient appropriate evidence.
    <bullet> Taking into account recent changes in auditing practice. 
Revising PCAOB auditing standards to take into account recent changes 
that some firms have implemented to make their auditing practices more 
rigorous for audits that involve other auditors should make those 
improved practices more uniform across all accounting firms and enable 
the PCAOB to enforce more rigorous provisions across all firms.
    Because of the lead auditor's central role in an audit involving 
multiple firms, the amendments adopted by the Board seek to strengthen 
the existing requirements and impose a more uniform approach to the 
lead auditor's oversight of other auditors' work. These improvements 
are intended to increase the lead auditor's involvement in and 
evaluation of the work of other auditors generally, improve 
communication among the lead auditor and other auditors, enhance the 
ability of the lead auditor to prevent or detect deficiencies in the 
work of other auditors, and thus facilitate improvements in the quality 
of audits involving other auditors and promote investor protection.
Comments on the Reasons for Standard Setting
    A number of commenters on the proposing releases broadly expressed 
support for enhancing PCAOB standards for using the work of other 
auditors and referred-to auditors, or stated that the proposed 
rulemaking would lead to improvements in audit quality. Some of the 
same commenters and others supported the Board's objective of 
establishing requirements for overseeing other auditors' work that are 
risk-based and more closely aligned with the Board's risk assessment 
standards than the existing standards are. Some commenters supported 
updating PCAOB standards in light of, among other things, changes in 
the business environment, company structure, accounting firm and 
network structure, regulation, and financial reporting, and the 
increased prevalence of audits involving other auditors. Some other 
commenters supported providing a more uniform approach to the lead 
auditor's supervision of other auditors. However, in the view of one 
commenter, some of the root causes of poor audit performance are not 
obvious, they have specific effects that are hard to isolate, and not 
all can be remedied by auditors and the PCAOB.
    Although commenters generally supported applying a risk-based 
approach to the lead auditor's oversight of other auditors' work, some 
commenters on the proposing releases expressed concerns about certain 
aspects of the amendments and their economic impact. Some recommended 
further improvements to the proposed amendments. In the view of some 
commenters, the amendments should include additional direction in 
certain areas, be more scalable and better aligned with the risk-based 
approach, and provide more latitude for the lead auditor to exercise 
professional judgment, e.g., in determining the nature, timing, and 
extent of supervisory activities. The Board's consideration of the 
comments received is discussed further in this document.
    In adopting the amendments, the Board took into account the 
comments received on the proposing releases. Based on information 
available to the Board--including the current regulatory baseline, 
observations from the Board's oversight activities, academic 
literature, and comments--the Board believes that investors will 
benefit from strengthened and clarified auditing standards in this 
area. While the Board does not expect that the revisions to the 
standards will (or ever could) entirely eliminate audit deficiencies in 
this area, the revisions will clarify the auditor's responsibilities, 
align the applicable requirements with the PCAOB's risk-based 
supervisory standards, and improve the quality of audits.
Overview of Final Rules
    The amendments the Board adopted are intended to strengthen the 
existing requirements and impose a more uniform approach to the lead 
auditor's supervision of other auditors.\53\ As discussed in more 
detail in this document, they are designed to increase the lead 
auditor's involvement in, and evaluation of, the work of other 
auditors, enhance the lead auditor's ability to prevent or detect 
deficiencies in the work of other auditors, and facilitate improvements 
in the quality of the work of other auditors. In addition, the Board 
adopted a new auditing standard that will apply when the lead auditor 
divides responsibility for an audit with another accounting firm. The 
key aspects of the amendments and new standard include:
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    \53\ The amendments apply to audits of issuers, as defined in 
Section 2(a)(7) of Sarbanes-Oxley, 15 U.S.C. 7201(7), and also to 
audits of brokers and dealers, as defined in Sections 110(3) and (4) 
of Sarbanes-Oxley, 15 U.S.C. 7220(3)-(4).
---------------------------------------------------------------------------

    <bullet> Planning the audit. AS 2101, Audit Planning, as amended 
\54\ will provide that:
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    \54\ The amendments to AS 2101 and AS 1201 appear in the main 
body of each standard and in Appendix A of AS 2101. As originally 
proposed, most of the amendments to these standards would have 
appeared in a new Appendix B of each standard. As adopted, the 
provisions that would have appeared in Appendix B are instead 
integrated in the main body of the standards. See 2021 SRC at 9.
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    <bullet> In audits involving other auditors or referred-to 
auditors, the engagement partner should determine whether the 
participation of his or her firm is sufficient for the firm to carry 
out the responsibilities of a lead auditor and to report as such on the 
company's financial statements.\55\ The amendments also describe 
considerations for making the sufficiency determination. (AS 2101.06A)
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    \55\ Under the amended standard, in an integrated audit of 
financial statements and internal control over financial reporting 
(``ICFR''), the lead auditor's participation in the audit of ICFR 
must also be sufficient to provide a basis for it to serve as the 
lead auditor of ICFR. (AS 2101.06C)
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    <bullet> In audits involving referred-to auditors, the Board has 
established that participation of the engagement partner's firm is 
ordinarily not sufficient for it to serve as lead auditor if more than 
50 percent of the assets or revenues are audited by referred-to 
auditors. (AS 2101.06A)

[[Page 39688]]

    <bullet> Another amended PCAOB standard, AS 1220, Engagement 
Quality Review, will expressly require that the engagement quality 
reviewer for the audit review the engagement partner's determination 
about the sufficiency of his or her firm's participation in the audit 
to serve as lead auditor. (AS 1220.10a)
    <bullet> In audits that involve work performed by other auditors 
regarding locations or business units, the lead auditor's involvement 
(through planning and performing audit procedures and supervising other 
auditors) should be commensurate with the risks of material 
misstatement associated with those locations or business units. (AS 
2101.06B)
    <bullet> When determining the engagement's compliance with 
independence and ethics requirements in audits involving other 
auditors, the lead auditor should:
    <bullet> Understand the other auditor's knowledge of SEC 
independence requirements and PCAOB independence and ethics 
requirements (``independence and ethics requirements''), and experience 
in applying the requirements. (AS 2101.06Da)
    <bullet> Obtain and review written affirmations \56\ regarding (1) 
the other auditor's policies and procedures regarding independence and 
ethics requirements and, if there are none, a description of how it 
determines its compliance; (2) the other auditor's compliance with 
independence and ethics requirements, which also describe the nature of 
any instances of non-compliance; and (3) a description of all 
relationships between the other auditor and the audit client or persons 
in financial reporting oversight roles that may reasonably be thought 
to bear on independence. (AS 2101.06Db)
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    \56\ The terms ``obtain,'' ``retain,'' ``written,'' or ``in 
writing'' do not mandate that documents related to the audit be 
paper-based. See paragraph .04 of AS 1215, Audit Documentation 
(audit documentation may be in the form of paper, electronic files, 
or other media).
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    <bullet> Inform the other auditor of changes that affect 
determining compliance with independence and ethics requirements and 
are relevant to the other auditor's affirmations and descriptions. (AS 
2101.06Dc(1))
    <bullet> Request that the other auditor update its affirmations and 
descriptions to reflect any changes in circumstances. (AS 2101.06Dc(2))
    <bullet> If the other auditor would play a substantial role in the 
audit,\57\ the lead auditor may use the other auditor only if the other 
auditor is registered with the PCAOB. (AS 2101.06G)
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    \57\ See PCAOB Rule 1001(p)(ii) (defining the phrase ``play a 
substantial role in the preparation or furnishing of an audit 
report''), including conforming amendments for the term ``lead 
auditor'' as revised in this document.
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    <bullet> With respect to the other auditor's knowledge, skill, and 
ability, the lead auditor should:
    <bullet> Understand the knowledge, skill, and ability of the other 
auditor's engagement team members who assist the lead auditor with 
planning and supervision. (AS 2101.06Ha)
    <bullet> Obtain a written affirmation from the other auditor that 
its engagement team members possess the knowledge, skill, and ability 
to perform the assigned tasks. (AS 2101.06Hb)
    <bullet> Determine that it can communicate with other auditors and 
gain access to their audit documentation. (AS 2101.06Hc)
    <bullet> In multi-tiered audits, a first other auditor may assist 
the lead auditor in performing procedures with respect to second other 
auditors concerning independence and ethics requirements; the 
knowledge, skill, and ability of the second other auditors; and 
communications with second other auditors. (AS 2101.06E, .06I)
    <bullet> Supervising the audit. AS 1201, Supervision of the Audit 
Engagement, as amended will require that the lead auditor:
    <bullet> Supervise other auditors under the Board's standard on 
supervision of the audit engagement (AS 1201) when the lead auditor 
assumes responsibility for the other auditor's work (i.e., does not 
divide responsibility for the audit with an other auditor).\58\
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    \58\ The work of engaged assistants from outside the firm (e.g., 
leased staff, secondees, staff from a shared service center) will be 
governed by the same standards that apply to the work of assistants 
inside the firm (e.g., firm partners, shareholders, employees), 
including the supervision provisions in AS 1201.05-.06. See, e.g., 
Staff Audit Practice Alert No. 6, at 7-11 (July 12, 2010) 
(discussing engaging assistants from outside the firm).
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    <bullet> Inform other auditors of the scope of their work and the 
following items with respect to the work requested to be performed: 
identified risks of material misstatement associated with the location 
or business unit, tolerable misstatement, and the amount (if 
determined) below which misstatements are clearly trivial and do not 
need to be accumulated. (AS 1201.08)
    <bullet> Obtain and review the other auditor's written description 
of procedures to be performed and discuss with, and communicate in 
writing to, the other auditor any needed changes to the planned 
procedures. (AS 1201.09-.10)
    <bullet> Obtain and review a written affirmation from the other 
auditor as to whether the other auditor has performed work in 
accordance with the lead auditor's instructions, and, if the other 
auditor has not performed such work, a description of the nature of, 
and explanation of the reasons for, the instances where the work was 
not performed in accordance with the instructions, including (if 
applicable) a description of the alternative work performed. (AS 
1201.11)
    <bullet> Direct other auditors to provide specified documentation 
concerning work performed.\59\ (AS 1201.12)
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    \59\ Under PCAOB standards, the lead auditor's necessary extent 
of review of the other auditors' documentation depends on the 
necessary extent of supervision by the lead auditor (see AS 
1201.06). The documentation to be reviewed by the lead auditor 
should include, at a minimum, the documentation described in AS 
1215.19.
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    <bullet> Determine whether the other auditor performed the work as 
instructed and whether additional audit evidence needs to be obtained. 
(AS 1201.13)
    <bullet> Evaluate, in a multi-tiered audit where the lead auditor 
seeks assistance from a first other auditor to perform any of the above 
responsibilities with respect to second other auditors,\60\ the first 
other auditor's supervision of second other auditors. (AS 1201.14)
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    \60\ For a more detailed discussion of multi-tiered audits, see 
discussion below.
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    <bullet> Dividing responsibility for the audit. When the lead 
auditor divides responsibility for the audit with another accounting 
firm, new auditing standard AS 1206, Dividing Responsibility for the 
Audit with Another Accounting Firm, will provide that:
    <bullet> The lead auditor should determine that audit procedures 
are performed to test and evaluate the consolidation or combination of 
the financial statements of the business units audited by the referred-
to auditor into the company's financial statements. (AS 1206.03)
    <bullet> The lead auditor should communicate in writing to the 
referred-to auditor the plan to divide responsibility for the audit. 
(AS 1206.04)
    <bullet> The lead auditor should obtain written representation from 
the referred-to auditor that it is independent under PCAOB and SEC 
requirements and duly licensed to practice. (AS 1206.05)
    <bullet> The lead auditor may divide responsibility for the audit 
with a referred-to auditor only if:
    <bullet> The referred-to auditor represents it performed its audit 
and issued its report in accordance with PCAOB standards;
    <bullet> The lead auditor determines that the referred-to auditor 
is familiar with the relevant financial reporting requirements and 
PCAOB standards;

[[Page 39689]]

    <bullet> The referred-to auditor is registered with the PCAOB if it 
played a substantial role in the audit or its report is with respect to 
a business unit that is itself an issuer, broker, or dealer;
    <bullet> In case of the conversion of business unit financial 
statements from another financial reporting framework to the financial 
reporting framework of the company, the lead auditor or the referred-to 
auditor audits the conversion adjustments, and the lead auditor 
indicates in its report which auditor was responsible for that. (AS 
1206.06)
    <bullet> In situations where the lead auditor is unable to divide 
responsibility, the lead auditor should: plan and perform procedures 
necessary to issue an auditor's report that expresses an opinion; 
qualify or disclaim an opinion; or withdraw from the engagement. (AS 
1206.07)
    <bullet> The lead auditor's audit report must indicate clearly the 
division of responsibility, identify the referred-to auditor by name 
and refer to its report, and disclose the magnitude of the portion of 
the financial statements (or internal controls over financial 
reporting) audited by the referred-to auditor. (AS 1206.08)
    <bullet> If the referred-to auditor's report is not a standard 
(i.e., unqualified) report, the lead auditor should make reference to 
the departure, unless the matter is clearly trivial to the financial 
statements. (AS 1206.09)
    <bullet> Additional amendments. The amendments the Board adopted 
also:
    <bullet> Rescind AS 1205, Part of the Audit Performed by Other 
Independent Auditors.
    <bullet> This change, in effect, requires lead auditors to 
supervise (directly or through other auditors) work performed by other 
auditors under AS 1201 in all cases, unless the lead auditor divides 
responsibility for the audit with another (referred-to) auditor, in 
which case AS 1206 applies.
    <bullet> Revise AS 1015, Due Professional Care in the Performance 
of Work, to emphasize that other auditors are responsible for 
performing their work with due professional care.
    <bullet> Revise AS 1215 to expressly state that, in an audit 
involving other auditors, an other auditor must retain documentation of 
the work that it performs, and that its documentation is subject to the 
requirements related to subsequent modification.
    <bullet> Amend Appendix B, Audit Evidence Regarding Valuation of 
Investments Based on Investee Financial Results, of AS 1105, Audit 
Evidence, to distinguish it from requirements involving other auditors 
or referred-to auditors, by using a more descriptive term, ``investee 
auditor'' (including in situations involving equity method investees), 
and making certain other clarifying edits.
    <bullet> Include definitions of key terms ``engagement team,'' 
``lead auditor,'' ``other auditor,'' and ``referred-to auditor'' in AS 
2101.
    <bullet> Revise other PCAOB standards and rules to conform to these 
amendments.

Additional Discussion of the Amendments and New Standard

Introduction

    The changes to PCAOB standards the Board adopted were intended to 
improve the quality of audits that involve one or more public 
accounting firms, and accountants at those firms, that are outside the 
accounting firm issuing the auditor's report. This section discusses in 
more detail amendments to auditing standards and a new auditing 
standard adopted by the Board relating to the use of other auditors and 
dividing responsibility for the audit with another accounting firm 
(collectively, ``amendments'' or ``final amendments''). The Board 
adopted these amendments after taking into account public comments that 
were received on the requirements proposed in 2016 and in response to 
supplemental requests for comment issued in 2017 and 2021 as discussed 
in more detail below in connection with the amendments.
    In brief, the amendments include:
    <bullet> Amendments to AS 1015, Due Professional Care in the 
Performance of Work; AS 1105, Audit Evidence; AS 1201, Supervision of 
the Audit Engagement; AS 1215, Audit Documentation; AS 1220, Engagement 
Quality Review; and AS 2101, Audit Planning;
    <bullet> A new auditing standard, AS 1206, Dividing Responsibility 
for the Audit with Another Accounting Firm, for situations in which the 
accounting firm issuing the auditor's report divides responsibility for 
the audit with another accounting firm; and
    <bullet> Other related amendments to PCAOB auditing standards.
    In general, the amendments extend the risk-based supervision 
requirements of PCAOB auditing standards to all situations in which 
other auditors participate in an audit, unless the lead auditor divides 
responsibility for the audit with another auditor.\61\ The amendments 
also strengthen the requirements and provide additional direction to 
the lead auditor about its responsibilities. For the relatively 
infrequent situations when the lead auditor divides responsibility for 
the audit with another auditor, the amendments strengthen the existing 
approach under PCAOB standards.
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    \61\ For situations involving auditors of the financial 
statements of the company's investees, see discussion below.
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    The amendments also rescind AS 1205, Part of the Audit Performed by 
Other Independent Auditors, and AI 10, Part of the Audit Performed by 
Other Independent Auditors: Auditing Interpretations of AS 1205.
    The amendments to AS 1201 and AS 2101 appear in the main body of 
each standard and in Appendix A of AS 2101. As originally proposed, 
most of the amendments to these standards would have appeared in a new 
Appendix B of each standard. As proposed in the 2021 SRC, the 
provisions that would have appeared in Appendix B were instead 
relocated to the body of the two standards (AS 1201 and AS 2101) to 
enhance the readability and usability of the amendments and to better 
facilitate their implementation. One commenter on the 2021 SRC 
commended the PCAOB for relocating the amendments from Appendix B of 
each standard to the body of the standards, stating that it improves 
usability and clarity.

Definitions of Engagement Team, Lead Auditor, Other Auditor, and 
Referred-to Auditor

See paragraphs .A3-.A6 of AS 2101
    To operationalize the requirements included in this release, the 
amendments define the terms ``engagement team,'' ``lead auditor,'' 
``other auditor,'' and ``referred-to auditor,'' as discussed below. A 
commenter on the 2021 SRC recommended alignment of the terminology used 
in the PCAOB's standards with that of the International Auditing and 
Assurance Standards Board (``IAASB'') and the American Institute of 
Certified Public Accountants Auditing Standards Board (``ASB''). After 
considering the comment, the Board adopted the definitions 
substantially as proposed, because they are designed for the 
requirements of this rulemaking, which differ from those in the 
analogous IAASB and ASB standards. These definitions are included in 
Appendix A of AS 2101 and referenced in other PCAOB standards, where 
applicable.
Definition of ``Engagement Team''
See paragraph .A3 of AS 2101
    Under existing PCAOB standards, the engagement partner is 
responsible for the engagement and its performance, including the 
proper supervision of the work of engagement team members and

[[Page 39690]]

for compliance with PCAOB standards.\62\ The term ``engagement team'' 
is commonly used in PCAOB auditing standards but has not been defined. 
The definition of ``engagement team'' that the Board adopted in AS 2101 
will apply to AS 1201 and AS 2101, as amended, and to the new standard, 
AS 1206. The term specifies, for example, the persons subject to the 
lead auditor's supervision under AS 1201, which standard will now apply 
to the relationship between the lead auditor and all other auditors for 
whose work the lead auditor assumes responsibility, including those 
currently covered by rescinded AS 1205.
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    \62\ See AS 1201.03.
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    The Board adopted a revised definition to conform to previous 
amendments to the Board's standards and to address 2021 SRC comments 
received. Subparagraph (2) of the revised definition conforms to 
terminology used in Appendix C, Supervision of the Work of Auditor-
Employed Specialists, of AS 1201, which the Board adopted in 2018.\63\ 
As revised, the definition of ``engagement team'' includes:
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    \63\ See Amendments to Auditing Standards for Auditor's Use of 
the Work of Specialists, PCAOB Release No. 2018-006 (Dec. 20, 2018).
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    (1) Partners, principals, and shareholders of, and accountants \64\ 
and other professional staff employed or engaged by, the lead auditor 
or other accounting firms who perform audit procedures on an audit or 
assist the engagement partner in fulfilling his or her planning or 
supervisory responsibilities on the audit pursuant to AS 2101 or AS 
1201; and
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    \64\ See paragraph (a)(ii) of PCAOB Rule 1001, Definitions of 
Terms Employed in Rules, which defines the term ``accountant.'' 
(This footnote referring to Rule 1001 is included in the definition 
of ``engagement team'' appearing in AS 2101.A3.)
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    (2) Specialists who, in connection with the audit, (i) are employed 
by the lead auditor or an other auditor participating in the audit and 
(ii) assist that auditor in obtaining or evaluating audit evidence with 
respect to a relevant assertion of a significant account or 
disclosure.\65\
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    \65\ The final amendments add the phrase ``in connection with 
the audit'' and replace ``assist their firm'' with ``assist that 
auditor'' for clarity.
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    The definition excludes:
    (1) The engagement quality reviewer and those assisting the 
reviewer (to which AS 1220 applies);
    (2) Partners, principals, and shareholders of, and other 
individuals employed or engaged by, another accounting firm in 
situations in which the lead auditor divides responsibility for the 
audit with the other firm under AS 1206; and
    (3) Engaged specialists.\66\
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    \66\ AS 1210, Using the Work of an Auditor-Engaged Specialist, 
establishes requirements that apply to the use of specialists 
engaged by the auditor's firm. Appendix A of AS 1105 sets forth the 
auditor's responsibilities for using the work of a specialist 
employed or engaged by the company. (This footnote referring to AS 
1210 and AS 1105 is included in the definition of ``engagement 
team'' appearing in AS 2101.A3.)
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    In general, the engagement team, as defined, encompasses the 
engagement partner and individual accountants who perform procedures to 
obtain and evaluate audit evidence, as well as specialists employed by 
one of the participating audit firms who perform audit procedures. The 
following table illustrates the distinction between engagement team 
members and parties who are not engagement team members under the 
definition the Board adopted.

------------------------------------------------------------------------
                                             Examples of parties who are
    Examples of engagement team members      NOT engagement team members
------------------------------------------------------------------------
<bullet> Engagement partner                 <bullet> Auditor-engaged
                                             specialists.\67\
<bullet> Personnel from the engagement      <bullet> Engagement quality
 partner's firm \68\ who perform audit       reviewer and those
 procedures on the audit                     assisting the reviewer.\69\
                                            <bullet> Appendix K or
                                             filing reviewer.\70\
                                            <bullet> Service auditors of
                                             a third-party service
                                             organization.\71\
<bullet> Personnel of accounting firms and  <bullet> A firm professional
 individual accountants outside the          who performs a
 engagement partner's firm who perform       contemporaneous quality
 audit procedures on the audit (supervised   control function (e.g.,
 under AS 1201) \72\                         internal inspection or
                                             quality control review) but
                                             does not perform audit
                                             procedures or help plan or
                                             supervise the audit work
<bullet> A firm professional in the         <bullet> Individuals
 national office or centralized group in     employed or engaged by the
 the firm (including within the firm's       company being audited, such
 network) who performs audit procedures on   as a company's internal
 the audit or assists in planning or         auditors, a company's
 supervising the audit                       specialists, and a
                                             company's consultants.\73\
------------------------------------------------------------------------

     
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    \67\ The term ``engagement partner's firm'' is used in this 
rulemaking to describe the registered public accounting firm issuing 
the auditor's report. (See first note to AS 2101.A4.)
    \68\ See AS 1210.
    \69\ AS 1220 applies to those persons.
    \70\ Reviewers under Appendix K of SEC Practice Section 
(``SECPS'') Section 1000.45, SECPS Member Firms with Foreign 
Associated Firms That Audit SEC Registrants, would not be considered 
members of the engagement team. Those reviewers, similar to the 
engagement quality reviewer, do not make decisions on behalf of the 
engagement team or assume any of the responsibilities of the 
engagement team.
    \71\ AS 2601, Consideration of an Entity's Use of a Service 
Organization, sets forth the auditor's responsibilities with respect 
to using the work of service auditors who issue reports on the 
controls of a third-party service organization.
    \72\ This includes personnel of accounting firms described in 
rescinded AS 1205 as other auditors for whose work the ``principal 
auditor'' (which is the term used in AS 1205) assumes 
responsibility. By including these individuals in the engagement 
team, the amendments expand the lead auditor's responsibility to 
apply the risk-based supervision approach to all accounting firms 
involved in the audit, except in situations in which the lead 
auditor divides responsibility for the audit with another accounting 
firm. (If the lead auditor divides responsibility for the audit with 
another accounting firm, that firm is considered a referred-to 
auditor under AS 1206.)
    \73\ Because of their roles at the company, the work of 
individuals employed or engaged by the company is not subject to 
supervision under AS 1201; they are not considered members of the 
engagement team under the adopted definition. PCAOB standards 
include requirements regarding the auditor's use of work performed 
by some of these individuals. See, e.g., AS 1105, Appendix A; AS 
2201, An Audit of Internal Control Over Financial Reporting That Is 
Integrated with An Audit of Financial Statements; AS 2605, 
Consideration of the Internal Audit Function.
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    A commenter on the 2021 SRC asked whether the Board considered the 
potential ramifications of the difference between the proposed 
definition of ``engagement team'' and the analogous term ``audit 
engagement team'' in SEC independence requirements. One commenter 
acknowledged that the Board addressed this question in the 2016 
Proposal and recommended that the Board add an explanatory footnote to 
the rule text in the definition of ``engagement team.''
    The Board purposely adopted a definition of ``engagement team'' 
that is narrower than the definition of ``audit engagement team'' in 
the SEC's independence rules. See Rule 2-01(f)(7)(i) of Regulation S-X, 
17 CFR 210.2-01(f)(7)(i). In addition to the individuals within the 
Board's definition of ``engagement team,'' the definition in SEC Rule 
2-01(f)(7)(i) also encompasses certain individuals who are not included 
in the Board's definition, such as the engagement quality reviewer. The 
Board noted that neither the definition of ``engagement team'' nor any 
other amendments in this

[[Page 39691]]

release affect the definitions within, or the applicability of, the 
independence requirements of the SEC.
    Another commenter expressed concern that the definition of 
``engagement team'' for purposes of AS 2101, AS 1201, and AS 1206 could 
have implications for other standards. This commenter cited other 
auditing standards outside of these three standards that use the term 
``engagement team'' and encouraged the PCAOB to revisit these instances 
to determine the implications for those standards of the new 
definition. The Board noted that, although the definition is not 
repeated across all other PCAOB standards, the term ``engagement team'' 
in other PCAOB standards has the same meaning as the defined term in AS 
2101.A3.\74\
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    \74\ See proposed rule text for further amendments made to PCAOB 
standards in order to clarify that the term ``engagement team'' has 
the same meaning (or, where applicable, analogous meaning) as the 
defined term in AS 2101.A3.
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    Finally, a couple of commenters recommended clarifying the 
definition of ``engagement team'' with respect to auditor-employed 
specialists. One commenter suggested specifying that auditor-employed 
specialists can be engagement team members only if they participate in 
the audit, while the other suggested changing the proposed reference to 
``their firm'' to instead employ the defined terms ``lead auditor'' and 
``other auditor.'' The Board made corresponding clarifying edits to 
subparagraph (2) of the definition. Apart from making these changes and 
certain minor clarifying edits, the Board adopted the definition of 
``engagement team'' as proposed in the 2021 SRC.
Definition of ``Lead Auditor''
See paragraph .A4 of AS 2101
    The amendments introduce the new term ``lead auditor'' for both 
types of scenarios addressed by this rulemaking: supervising other 
auditors' work under AS 1201, and dividing responsibility for the audit 
with another accounting firm under AS 1206.\75\ The term ``lead 
auditor'' replaces the term ``principal auditor'' that is currently 
used in several PCAOB standards.\76\ Under the amendments, the term 
``lead auditor'' means the firm issuing the auditor's report, the 
engagement partner of that firm, and other personnel of that firm (or 
their functional equivalents) who perform planning or supervisory 
responsibilities from that firm.
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    \75\ The amendments rescind AS 1205, which uses the term 
``principal auditor.''
    \76\ See Other Related Amendments to PCAOB Auditing Standards.
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    The definition is key to this rulemaking because it identifies the 
firm and individuals who are responsible for carrying out the 
requirements under the amendments:
    Lead auditor--
    (a) The registered public accounting firm \77\ issuing the 
auditor's report on the company's financial statements and, if 
applicable, internal control over financial reporting; and
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    \77\ See paragraph (r)(i) of PCAOB Rule 1001, which defines the 
term ``registered public accounting firm.'' This footnote is 
included within the definition appearing in AS 2101.A4.
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    (b) The engagement partner and other engagement team members who 
both:
    (1) Are partners, principals, shareholders, or employees of the 
registered public accounting firm issuing the auditor's report (or 
individuals who work under that firm's direction and control and 
function as the firm's employees); and
    (2) Assist the engagement partner in fulfilling his or her planning 
or supervisory responsibilities on the audit pursuant to AS 2101 or AS 
1201.\78\
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    \78\ See paragraph .05a of AS 2301, The Auditor's Responses to 
the Risks of Material Misstatement, which describes making 
appropriate assignments of significant engagement responsibilities. 
See also AS 1015.06, according to which ``[e]ngagement team members 
should be assigned to tasks and supervised commensurate with their 
level of knowledge, skill, and ability.'' This footnote is included 
within the definition appearing in AS 2101.A4.
---------------------------------------------------------------------------

    Note: The registered public accounting firm issuing the auditor's 
report is also referred to in this standard as ``the engagement 
partner's firm.''
    Note: Individuals such as secondees \79\ who work under the 
direction and control of the registered public accounting firm issuing 
the auditor's report would function as the firm's employees.
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    \79\ For this purpose, the term ``secondee'' refers to an 
individual participating in a secondment arrangement in which, for 
at least three consecutive months, (1) a professional employee of an 
accounting firm in one country works for a registered public 
accounting firm that is located in another country and is issuing an 
auditor's report, and (2) the professional employee performs audit 
procedures with respect to entities and their operations in that 
other country and does not perform more than de minimis audit 
procedures in relation to entities or business operations in the 
country of his or her employer. A secondee can be either physically 
located in that other country or working through a remote work 
arrangement. This footnote is included within the definition 
appearing in AS 2101.A4.
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    Several commenters on the 2021 SRC indicated that the definition of 
``lead auditor'' was sufficiently clear. One commenter on the 2021 SRC 
stated there was lack of clarity about the use of the term ``lead 
auditor'' in circumstances when the audit does not involve other 
auditors or referred-to auditors. This commenter suggested that the 
proposed standard explicitly acknowledge either: (1) the registered 
public accounting firm that issues the auditor's report is always the 
lead auditor, including when there are no other auditors or referred-to 
auditors or (2) the registered public accounting firm that issues the 
auditor's report is only a lead auditor if the audit involves other 
auditors or referred-to auditors (and therefore modifications would 
need to be made to the definition of engagement team).
    In the proposing releases, the Board stated that the term ``lead 
auditor'' would apply to these scenarios: supervising other auditors 
under AS 1201 and dividing responsibility for the audit under proposed 
AS 1206. In addition, the amendments already clearly indicate that the 
term will apply when other auditors or referred-to auditors are 
involved in the audit.\80\
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    \80\ See, e.g., AS 2101.04.
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    The description of ``secondee'' was added to the proposed 
amendments in the 2021 SRC.\81\ Several commenters said that the 
description was too prescriptive, given the flexibility in location 
where audit professionals may work, as demonstrated throughout the 
COVID-19 pandemic. Most of these commenters were supportive of its 
inclusion as an example in the rule text, but recommended that 
``secondee'' not be defined so narrowly. They also suggested that 
individuals who work at shared service centers be included as an 
example in the rule text given the continued increase in their use. In 
addition, one commenter said that it did not agree with the Board that 
at all times (now and in the future) individuals who work at shared 
service centers will work under the direction and control of and 
function as employees of the lead auditor firm.
---------------------------------------------------------------------------

    \81\ See 2021 SRC at A1-16 (proposed footnote 5 of AS 2101.A4).
---------------------------------------------------------------------------

    After considering the comments received, the Board is revising 
footnote 5 of AS 2101.A4 to be similar to revised Form AP staff 
guidance \82\ on secondees. Those revisions recognized that, because of 
the recent advances in technology and remote work arrangements, 
location should not necessarily be a factor in determining whether 
secondees work under the direction and control of the firm and function 
as their employees. Further, the Board agrees that under the amendments 
secondees from other accounting firms and employees of

[[Page 39692]]

shared service centers who both work under the firm's direction and 
control (as with other individuals who work in the role of firm 
employees) and assist the engagement partner in fulfilling planning or 
supervisory responsibilities on the audit are part of the lead auditor.
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    \82\ See Staff Guidance, Form AP, Auditor Reporting of Certain 
Audit Participants, and Related Voluntary Audit Report Disclosure 
Under AS 3101, The Auditor's Report on an Audit of Financial 
Statements When the Auditor Expresses an Unqualified Opinion (Dec. 
17, 2021).
---------------------------------------------------------------------------

    Regarding the comment that individuals at shared service centers 
would not always function as ``employees of the lead auditor's firm,'' 
the amendments do not provide that all shared service center staff 
would function as employees of the lead auditor firm. For example, 
staff at a shared service center could be working on the audit under 
the direction and control of an audit firm other than the lead auditor. 
In that case, the individuals at the shared service center would 
function as employees of the other auditor, not the lead auditor firm.
    The Board considered these comments and determined that the 
proposed definition of lead auditor is sufficiently clear and, except 
for the revision to the footnote regarding secondees discussed above, 
adopted it as proposed in the 2021 SRC.
Definitions of ``Other Auditor'' and ``Referred-to Auditor''
For the Term ``Other Auditor,'' See Paragraph .A5 of AS 2101, and For 
the Term ``Referred-to Auditor,'' See Paragraph .A6 of AS 2101
    Several existing PCAOB standards use the term ``other auditor'' to 
encompass any auditors outside the lead auditor that participate in an 
audit, regardless of whether the lead auditor supervises them under AS 
1201, assumes responsibility for their work under AS 1205, or makes 
reference to them under AS 1205.\83\ The amendments define two terms: 
``other auditor,'' and ``referred-to auditor.'' These definitions are 
as follows:
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    \83\ For example, AS 1205 uses the term ``other auditors'' to 
describe accounting firms whose work the lead auditor uses or with 
which it divides responsibility for the audit. By contrast, AS 
1215.18-.19 uses the term ``other auditors'' when describing offices 
of the firm issuing the audit report and other firms participating 
in the audit.
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    Other auditor--
    (a) A member of the engagement team who is not:
    (1) A partner, principal, shareholder, or employee of the lead 
auditor or
    (2) An individual who works under the direction and control of the 
registered public accounting firm issuing the auditor's report and 
functions as that firm's employee; and
    (b) A public accounting firm, if any, of which such engagement team 
member is a partner, principal, shareholder, or employee.
    Referred-to auditor--
    A public accounting firm, other than the lead auditor, that 
performs an audit of the financial statements and, if applicable, 
internal control over financial reporting, of one or more of the 
company's business units \84\ and issues an auditor's report in 
accordance with the standards of the PCAOB to which the lead auditor 
makes reference in the lead auditor's report on the company's financial 
statements and, if applicable, internal control over financial 
reporting.\85\
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    \84\ The term ``business units'' includes subsidiaries, 
divisions, branches, components, or investments. This footnote is 
included within the definition appearing in AS 2101.A6.
    \85\ See AS 1206, which sets forth the lead auditor's 
responsibilities regarding dividing responsibility for the audit of 
the company's financial statements and, if applicable, internal 
control over financial reporting, with a referred-to auditor. This 
footnote is included within the definition appearing in AS 2101.A6.
---------------------------------------------------------------------------

    Several commenters on the 2021 SRC indicated that the definition of 
``other auditor'' was sufficiently clear, and no commenters expressed 
concern about the definition of ``referred-to auditor.'' Some 
commenters on the 2016 Proposal asked whether the term ``referred-to 
auditor'' is aligned with the term ``principal accountant'' used by the 
SEC. The Board noted that the definitions it adopted do not affect the 
applicability of SEC terms or rules to audits involving other auditors 
or referred-to auditors, including the definition of ``principal 
accountant.''
    In addition, one commenter on the 2016 Proposal stated that the 
only difference between the definitions of other auditor and referred-
to auditor appears to be divided responsibility, but noted the 
definitions are substantially different. The Board notes that these 
definitions reflect differences in lead auditor responsibilities with 
respect to the other auditor and referred-to auditor. As noted above, 
under the amendments, the term ``other auditor'' encompasses both the 
individuals participating in the audit and their firm. In contrast, the 
lead auditor divides responsibility for the audit with the referred-to 
auditor, which issues the auditor's report on the financial statements 
(and, if applicable, internal control over financial reporting) of a 
company's business unit. Thus, the term ``referred-to auditor'' applies 
only to the firm because the firm issues an auditor's report in the 
divided-responsibility situation.
    The Board considered the comments and determined that the 
definitions of ``other auditor'' and ``referred-to auditor'' are 
sufficiently clear and adopted them as proposed in the 2021 SRC.
Planning the Audit
See Amendments to AS 2101
    In general, the amendments to AS 2101 carry forward and update 
certain requirements of AS 1205 and include certain procedures to be 
performed by the lead auditor.
    This section discusses planning requirements in AS 2101 for audits 
in which the lead auditor supervises the work of other auditors in 
accordance with AS 1201. It also discusses certain planning 
requirements, which appear in AS 2101, for audits in which the lead 
auditor divides responsibility for the audit with referred-to auditors 
in accordance with AS 1206.\86\ This section on planning requirements 
addresses the following topics:
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    \86\ In addition, this document discusses requirements for the 
lead auditor in AS 1206 relating to the referred-to auditor's (1) 
compliance with the SEC independence and PCAOB independence and 
ethics requirements, (2) registration pursuant to the rules of the 
PCAOB, and (3) knowledge of the relevant accounting, auditing, and 
financial reporting requirements.
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    <bullet> Serving as the lead auditor in an audit that involves 
other auditors or referred-to auditors (determining sufficiency of 
participation);
    <bullet> Other auditors' compliance with independence and ethics 
requirements;
    <bullet> PCAOB registration status of other auditors;
    <bullet> Knowledge, skill, and ability of and communications with 
other auditors; and
    <bullet> Determining locations or business units at which audit 
procedures should be performed.
Serving as the Lead Auditor in an Audit That Involves Other Auditors or 
Referred-to Auditors (Determining Sufficiency of Participation)
See Paragraphs .06A-.06C of AS 2101
    Under AS 2101 as amended, in audits involving other auditors or 
referred-to auditors, the engagement partner should determine whether 
the participation of his or her firm is sufficient for the firm to 
carry out the responsibilities of a lead auditor and to report as such 
on the company's financial statements. The considerations for 
determining the sufficiency of the firm's participation apply to audits 
in which the lead auditor supervises other auditors' work, divides 
responsibility for the audit with another accounting firm, or both. In 
contrast, the 50-percent participation threshold (discussed below) 
applies only to audits in which the lead auditor divides responsibility 
for the audit with another accounting firm.

[[Page 39693]]

    Planning is not a discrete phase of an audit, but rather is a 
continual and iterative process that continues until the completion of 
the audit.\87\ Therefore the engagement partner is expected to revisit 
his or her determination of the sufficiency of the lead auditor's 
participation throughout the audit if circumstances change. This may 
occur, for example, because of changes due to business combinations, 
divestitures, or other events that could affect the audit plan or 
allocation of work between the lead auditor and other auditors.
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    \87\ See AS 2101.05.
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Considerations for Serving as the Lead Auditor
See First Paragraph of .06A(a-c) of AS 2101
    AS 1205, which is being rescinded, provides that when significant 
parts of the audit are performed by other auditors (``other auditors'' 
and ``referred-to auditors'' under the amendments), the principal 
auditor (``lead auditor'' under the amendments) must decide whether the 
principal auditor's own participation is sufficient to enable it to 
serve as the principal auditor and issue the auditor's report on the 
company's financial statements. Under AS 1205.02, when determining 
whether the firm sufficiently participates in the audit, the principal 
auditor is required to consider, among other things, (i) the 
materiality of the portion of the financial statements audited in 
comparison with the portion audited by other auditors; (ii) the extent 
of the auditor's knowledge of the overall financial statements; and 
(iii) the importance of the components audited by the auditor in 
relation to the enterprise as a whole.
    The amendments to AS 2101 strengthen the existing requirement for 
determining the sufficiency of participation by: (i) extending the 
determination requirement to all audits involving other auditors and 
referred-to auditors,\88\ not just audits that have been covered by AS 
1205; (ii) imposing the determination requirement specifically on the 
engagement partner; and (iii) specifying certain considerations, based 
on risk and other factors, that should be taken into account in making 
the determination.
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    \88\ Below, this document discusses further conditions to be met 
in order to divide responsibility with another accounting firm.
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    In general, the sufficiency requirement is intended to increase the 
likelihood that the firm issuing the auditor's report (i.e., the lead 
auditor) meaningfully participates in the audit. The Board believes 
that compliance with this requirement should benefit all audits 
involving other auditors and referred-to auditors, not only audits that 
have been covered by AS 1205. Imposing the sufficiency requirement on 
the engagement partner is consistent with the engagement partner's 
existing responsibilities under PCAOB standards for planning the audit 
\89\ and for assigning tasks to and supervising engagement team 
members.\90\
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    \89\ See AS 2101.03.
    \90\ See AS 1015.06.
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    The amendments require that, when making the sufficiency 
determination, the engagement partner take into account the following, 
in combination, i.e., the engagement partner should take into account 
all three considerations:
    <bullet> Importance--The importance of the locations or business 
units for which the engagement partner's firm performs audit procedures 
in relation to the financial statements of the company as a whole, 
considering quantitative and qualitative factors;
    <bullet> Risk--The risks of material misstatement associated with 
the portion of the company's financial statements for which the 
engagement partner's firm performs audit procedures, in comparison with 
the portions for which the other auditors perform audit procedures or 
the portions audited by the referred-to auditors; and
    <bullet> Extent of supervision--The extent of the engagement 
partner's firm's supervision of the other auditors' work for portions 
of the company's financial statements for which the other auditors 
perform audit procedures.\91\
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    \91\ In a multi-tiered audit (see AS 1201.14), the consideration 
regarding extent of supervision applies only to the firm's 
supervision of a first other auditor and any other auditor that is 
supervised directly by the firm. See discussion of multi-tiered 
audits below.
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    Of these three considerations, only the risk consideration was 
included in the 2016 Proposal. Although it was intended to encompass 
both quantitative and qualitative aspects of participation, some 
commenters on the 2016 Proposal viewed a determination based solely on 
risk as too narrow, and some viewed it as primarily quantitative. 
Commenters expressed concern that it might result in denying a firm the 
ability to serve as lead auditor if it performed procedures only at the 
corporate headquarters and not at the company's operating units (which 
were audited by other auditors), even if that firm is otherwise best 
positioned to serve as lead auditor.
    The importance consideration was added in the 2017 SRC, after 
considering comments received on the 2016 Proposal. The addition was 
intended to more expressly address circumstances in which the lead 
auditor audits the locations or business units where the primary 
financial reporting decisions are made and consolidated financial 
statements are prepared, even though those locations or business units 
might not constitute a significant portion of the company's 
operations.\92\ A number of commenters on the 2017 SRC commented 
favorably on the importance consideration, noting generally that it 
would more directly enable the engagement partner to consider both 
quantitative and qualitative factors when determining the sufficiency 
of participation.
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    \92\ See 2017 SRC at 9.
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    Some commenters on the 2017 SRC viewed the sufficiency 
determination based on the two proposed considerations (importance and 
risk) as too restrictive for certain audits. Examples provided by the 
commenters included companies with highly dispersed management and 
financial reporting functions, especially those whose operations, 
headquarters, and financial reporting functions are primarily outside 
the company's corporate domicile. Commenters stated that applicable 
laws and regulations might require that the company's audit report be 
issued by a firm located in the jurisdiction where the company is 
domiciled, regardless of how much of the audit is performed by that 
auditor compared to other auditors. To address this issue, the 
commenters suggested providing additional considerations for the 
sufficiency-of-participation determination, including the firm's extent 
of supervision.
    The third consideration (extent of supervision) was added in the 
2021 SRC. This addition was designed to allow for a more comprehensive 
determination of the prospective lead auditor's involvement.
    Several commenters on the 2021 SRC generally supported the proposed 
addition of the consideration related to the extent of the engagement 
partner's firm's supervision of other auditors' work. Some of these 
comments also agreed that the sufficiency-of-participation 
determination by the engagement partner should be a risk-based 
assessment involving quantitative and qualitative considerations. One 
commenter on the 2021 SRC stated its understanding that an engagement 
partner may determine that his or her firm can serve as lead auditor by 
adjusting the extent of his or her firm's supervision of the other 
auditors' work to overcome instances where the other

[[Page 39694]]

auditors are performing audit procedures for significant parts of the 
audit. This same commenter said it would be helpful for the Board to 
acknowledge that an auditor who performs relatively fewer audit 
procedures on global business units can still be considered the lead 
auditor based on legal or regulatory requirements and his or her firm's 
supervision of other auditors.
    Other commenters continued to have concerns similar to those 
expressed in 2017 (e.g., regarding jurisdictional matters) even with 
the additional consideration. These commenters suggested that the Board 
provide further considerations, and therefore additional flexibility, 
for the determination.
    The Board believes the three considerations will enable engagement 
partners to address the multitude of scenarios encountered in practice 
when determining their firms' sufficiency of participation. With regard 
to the comments on jurisdictional challenges posed by laws and 
regulations, if the auditor's report is required to be issued by a firm 
licensed in a certain jurisdiction, under the amendments that firm 
could serve as lead auditor (subject to certain conditions such as 
necessary extent of supervision), even if it does not perform audit 
procedures on many of the company's subsidiaries. In addition, a firm 
could obtain additional staff to perform audit procedures under the 
firm's direction and control functioning as the firm's employees in 
order to be able to serve as the lead auditor. Adding more 
considerations, as some commenters suggested, could increase the risk 
that the firm issuing the auditor's report does not meaningfully 
participate in the audit, and thus was the ``lead auditor'' in name 
only.\93\ Permitting such arrangements would not achieve the intent of 
the amendments.
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    \93\ Such arrangements are sometimes referred to as ``letterbox 
audits.''
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    One commenter pointed out that with respect to divided-
responsibility situations, the lead auditor often may not be able to 
fully apply certain considerations (e.g., the concept of 
``supervision'' in AS 2101.06Ac). The Board noted that in a divided-
responsibility situation, the overall principles of .06Aa-b are the 
relevant considerations, because the consideration in .06Ac does not by 
its terms address referred-to auditors. AS 2101.06Ac states that the 
``extent of the engagement partner's firm's supervision of the other 
auditors' work for portions of the company's financial statements for 
which the other auditors perform audit procedures'' (emphasis added).
    After considering the comments received, the Board adopted the 
requirements substantially as proposed.\94\ The engagement partner will 
take into account the three considerations (importance, risk, and 
supervision) in combination to determine whether the full range of his 
or her firm's involvement in the audit constitutes sufficient 
participation to serve as the lead auditor.\95\
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    \94\ Footnote 4B to AS 2101.06Ac has been revised to add the 
following sentence: ``See also AS 1201.07, which states that for 
engagements that involve other auditors, AS 1201.08-.15 further 
describe procedures to be performed by the lead auditor with respect 
to the supervision of the work of other auditors, in conjunction 
with the required supervisory activities set forth in AS 1201.''
    \95\ The lead auditor's analysis of its sufficiency of 
participation should be documented pursuant to AS 1215.06, which 
requires, among other things, that audit documentation contain 
sufficient information to enable an experienced auditor, having no 
previous connection with the engagement, to understand the nature, 
timing, extent, and results of the procedures performed, evidence 
obtained, and conclusions reached.
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Fifty-Percent Participation Threshold for Divided-Responsibility Audits
See Second Paragraph of .06A of AS 2101
    For divided-responsibility audits,\96\ the Board determined to 
adopt, as proposed, amendments to reflect the following ``50-percent 
threshold,'' which applies in addition to two of the three 
considerations for determining the sufficiency of participation 
discussed above (importance and risk):\97\
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    \96\ According to PCAOB staff analysis of Form AP filings with 
the PCAOB, lead auditors currently divide responsibility with 
another auditor in about 40 issuer audits per year. Form AP filings 
in 2021, 2020, 2019, and 2018 disclosed 36, 41, 37, and 42 divided-
responsibility audits, respectively.
    \97\ This release, below, discusses further conditions to be met 
in order to divide responsibility with another accounting firm.

    [T]he participation of the engagement partner's firm ordinarily 
is not sufficient for it to serve as lead auditor if the referred-to 
auditors, in aggregate, audit more than 50 percent of the company's 
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assets or revenues.

    This 50-percent threshold is intended to reduce the likelihood that 
the lead auditor divides responsibility with an accounting firm or 
firms that audit a majority of the company's assets or revenue, and is 
consistent with the Board's approach to reinforcing the accountability 
of the lead auditor in audits involving other auditors.\98\ Including 
this threshold in the amendments also preserves a longstanding practice 
of the profession.
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    \98\ The threshold is similar to a quantitative threshold that 
appears in staff guidance set forth in the Financial Reporting 
Manual of the SEC Division of Corporation Finance (``Corp. Fin. 
Manual''). The Corp. Fin. Manual provides that a lead auditor is 
generally expected to have audited or assumed responsibility for at 
least 50 percent of the assets and revenues of the consolidated 
entity. See SEC, Division of Corporation Finance, Financial 
Reporting Manual, Section 4140.1.
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    One commenter on the 2021 SRC asserted (with respect to the 50-
percent threshold for divided-responsibility audits) that a firm's 
analysis as to whether it can reasonably serve as lead auditor must 
consider all the facts and circumstances, rather than simply 
consolidated assets or revenues. Another commenter asked that the 
wording of the 50-percent threshold be revised when referred-to 
auditors are involved because there are scenarios in which either 
assets or revenues audited by the referred-to auditor are greater than 
the assets or revenues audited by the lead auditor, such as when 
consolidated revenues of the company overall are nominal, but the 
amounts that do exist are audited by the referred-to auditor. This 
commenter believed that use of the term ``or'' will allow for false 
positives and restrict the ability of lead auditors to make reference 
to referred-to-auditors.
    After considering the comments, the Board adopted the 50-percent 
threshold as proposed. That threshold creates a presumption (not a 
bright line test) that the lead auditor will not divide responsibility 
with an accounting firm or firms that audit a majority of the company's 
assets or revenues.\99\ A firm could overcome the presumption and serve 
as lead auditor in exceptional situations, involving, for example, 
late-year acquisitions or other unanticipated events or conditions that 
increase the portion of assets or revenues audited by referred-to 
auditors beyond the 50-percent threshold. Under PCAOB standards, the 
firm would need to document why its participation in the audit was 
sufficient to serve as lead auditor, including how the firm satisfied 
the criteria based on the importance of the locations or business units 
it audited and risks of material misstatement associated with the 
portion of the company's financial statements that it audited.
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    \99\ Notably, while the comparison based on the importance of 
the locations or business units and risks of material misstatement 
associated with the portion of the financial statements is made 
singly (i.e., with regard to the engagement partner's firm's 
participation), the additional threshold based on assets and revenue 
is made with regard to all referred-to auditors in the aggregate.
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    The description of the 50-percent threshold in the amendments 
differs from the analogous description in the Corp. Fin. Manual because 
the PCAOB description uses terminology consistent with the amendments 
(whereas the

[[Page 39695]]

Corp. Fin. Manual's formulation uses terminology consistent with pre-
amendment standards) and because the PCAOB description is written in 
the negative: ``in an audit that involves referred-to auditors . . . 
the participation of the engagement partner's firm ordinarily is not 
sufficient for it to serve as lead auditor if the referred-to auditors, 
in aggregate, audit more than 50 percent of the company's assets or 
revenues.''
Supervising Based on Risk
See Paragraph .06B of AS 2101
    In some audits, the lead auditor might decide to increase the 
extent of its supervision of other auditors' work to provide additional 
support for the sufficiency-of-participation determination. Although 
this practice would contribute to the lead auditor's participation to 
some extent, performing additional supervisory procedures with respect 
to the other auditors does not, by itself, relieve the lead auditor of 
its own obligation to perform meaningful audit procedures in the audit.
    The amendments do not allow an audit firm to serve as lead auditor 
when all of the audit procedures are performed by other auditors, even 
under the lead auditor's supervision. A determination to serve as lead 
auditor under the amendments needs to be supported by a combination of 
supervision of other auditors by the lead auditor and the lead 
auditor's performance of audit procedures.
    In particular, the Board believes that a lead auditor, as the firm 
that issues the audit report, should perform audit procedures to a 
meaningful extent even if the company's business operations and 
financial reporting functions are located in a different country than 
the lead auditor. The following are examples \100\ of such procedures:
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    \100\ In addition, the lead auditor would perform audit 
procedures with respect to locations or business units selected for 
testing that the lead auditor assigned to itself.
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    <bullet> Procedures related to risks pervasive to the financial 
statements, such as risk assessment procedures directed to risks to the 
consolidated financial statements as a whole.\101\
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    \101\ See AS 2110.59b.
---------------------------------------------------------------------------

    <bullet> Procedures related to the consolidated financial 
statements, such as audit procedures regarding the period-end financial 
reporting process \102\ for the consolidated financial statements, and 
evaluation of the presentation of the consolidated financial 
statements, including the disclosures.\103\
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    \102\ See AS 2301.41.
    \103\ See paragraphs .30-.31 of AS 2810, Evaluating Audit 
Results.
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    <bullet> Other procedures related to the overall evaluation of 
audit results, such as performing overall analytical review procedures; 
\104\ evaluating accumulated misstatements; \105\ evaluating identified 
control deficiencies; \106\ evaluating the qualitative aspects of the 
overall financial statements, including potential management bias; 
\107\ evaluating conditions related to fraud risk assessment; \108\ and 
evaluating the sufficiency and appropriateness of the audit evidence 
obtained. \109\
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    \104\ See AS 2810.07-.09.
    \105\ See AS 2810.10-.23.
    \106\ See AS 2201.62-.70.
    \107\ See AS 2810.24-.27.
    \108\ See AS 2810.28-.29.
    \109\ See AS 2810.32-.36.
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    In these examples, the lead auditor would not need to perform these 
procedures exclusively. Rather, it could ask other auditors for 
assistance with some aspects of the above procedures, such as obtaining 
audit evidence relating to the business units assigned to the other 
auditors.
    In the amendments, AS 2101.06B, which is intended to be a reminder 
concerning existing requirements, provides that in an audit that 
involves other auditors performing work regarding locations or business 
units, the involvement of the lead auditor (through a combination of 
planning and performing audit procedures and supervision of other 
auditors) should be commensurate with the risks of material 
misstatement associated with those locations or business units. The 
requirement draws from existing requirements in AS 1201, AS 2101, and 
AS 2301, which require greater involvement in areas of greater 
risk.\110\ No commenters opposed the requirement.
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    \110\ See footnote 4C of AS 2101.06B, which cites, as examples, 
AS 1201.06, AS 2101.11 (``The auditor should assess the risks of 
material misstatement to the consolidated financial statements 
associated with the location or business unit and correlate the 
amount of audit attention devoted to the location or business unit 
with the degree of risk of material misstatement associated with 
that location or business unit.''), and, more generally, AS 2301.
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    The Board adopted this provision as proposed.
Sufficiency Considerations in an Integrated Audit of Financial 
Statements and Internal Control Over Financial Reporting
See Paragraph .06C of AS 2101
    In the amendments, AS 2101.06C states that in an integrated audit 
of a company's financial statements and its internal control over 
financial reporting (``ICFR'') that involves other auditors or 
referred-to auditors, the lead auditor of the financial statements must 
participate sufficiently in the audit of ICFR to provide a basis for 
serving as the lead auditor of ICFR. Only the lead auditor of the 
financial statements can be the lead auditor of ICFR. This amendment 
incorporates an existing requirement from AS 2201 regarding the 
sufficiency of the lead auditor's participation in the integrated audit 
of financial statements and ICFR.\111\ No commenters objected to this 
requirement, and the Board adopted it as proposed.
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    \111\ See conforming amendments to AS 2201.C8, .C10, and .C11. 
The terminology in these paragraphs has been updated to align with 
the amendments, without changing the intent of the requirements in 
these paragraphs.
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Other Auditors' Compliance With Independence and Ethics Requirements
See Paragraphs .06D and .06F of AS 2101 <SUP>112</SUP>
---------------------------------------------------------------------------

    \112\ See discussion below that, in multi-tiered audits, 
proposed AS 2101.06E would allow the lead auditor to seek assistance 
from the first other auditor in performing the procedures described 
in proposed AS 2101.06D. See also AS 1206 for requirements relating 
to audits involving referred-to auditors.
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    The amendments to AS 2101 relating to auditor independence and 
ethics requirements build on the existing, overarching responsibility 
of the auditor to determine compliance with independence and ethics 
requirements.\113\ The amendments are designed to position the lead 
auditor to identify matters that warrant further attention when 
determining the other auditor's compliance with those requirements. 
Commenters on the proposing releases generally agreed that the lead 
auditor should perform procedures regarding other auditors' compliance 
with these requirements. Several commenters, however, raised questions 
about specific aspects of the provisions, which are discussed below.
---------------------------------------------------------------------------

    \113\ See AS 2101.06b (requiring the auditor to ``[d]etermine 
compliance with independence and ethics requirements'' at the 
beginning of the audit and to reevaluate the determination 
throughout the audit). As noted above, the use of ``independence and 
ethics requirements'' in this release refers to PCAOB independence 
and ethics requirements and SEC independence requirements.
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Understanding the Other Auditor's Knowledge and Experience; Obtaining 
an Affirmation About Policies and Procedures, Changes in Circumstances
See Paragraphs .06Da, .06Db(1), and .06Dc(1)-(2) of AS 2101
    The Board adopted the amendments discussed in this section as they 
were proposed in the 2021 SRC. The

[[Page 39696]]

amendments in AS 2101.06D require the lead auditor to perform certain 
procedures ``in conjunction with determining compliance with'' 
independence and ethics requirements, to carry out its responsibilities 
pursuant to the existing requirements in paragraph .06b of AS 2101.
    AS 2101.06Da requires that the lead auditor obtain an understanding 
of the other auditor's knowledge of independence and ethics 
requirements and its experience in applying the requirements. AS 
2101.06Db(1) requires that the lead auditor obtain from the other 
auditor and review a written affirmation \114\ as to whether the other 
auditor has policies and procedures that provide reasonable assurance 
that it maintains compliance with independence and ethics requirements. 
If the other auditor does not have such policies and procedures, the 
lead auditor is required to obtain from the other auditor and review a 
written description of how the other auditor determines its compliance 
with the independence and ethics requirements.
---------------------------------------------------------------------------

    \114\ The final amendments use the term ``affirmation'' for 
certain communications within the engagement team (see, e.g., AS 
2101.06Db, AS 2101.06F, and AS 2101.06Hb), to better differentiate 
them from certain communications outside the engagement team, which 
are described in the amendments as ``representations'' (see, e.g., 
AS 1206).
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    The amendments require the lead auditor to (i) inform the other 
auditor of changes in circumstances of which the lead auditor becomes 
aware, and (ii) request that the other auditor update its affirmations 
and descriptions for changes in circumstances of which the other 
auditor becomes aware (including changes communicated by the lead 
auditor) and provide those documents to the lead auditor upon becoming 
aware of such changes.\115\ These amendments are meant to provide the 
lead auditor with information necessary for it to reevaluate compliance 
with independence and ethics requirements.\116\ Communications required 
by the amendments also reflect policies already adopted by a number of 
registered firms.
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    \115\ See AS 2101.06Dc, which applies to all affirmations and 
descriptions required by paragraph .06Db.
    \116\ See note to AS 2101.06b regarding reevaluating compliance.
---------------------------------------------------------------------------

    The Board notes that the nature and extent of the lead auditor's 
procedures for obtaining an understanding under paragraph .06Da will 
depend on the types of information available to the lead auditor about 
the other auditor. The following are examples of types of information 
that may be relevant to the lead auditor's understanding of the other 
auditor's knowledge of independence and ethics requirements, and the 
other auditor's experience in applying the requirements:
    <bullet> The type, frequency, and substance of independence and 
ethics training that the other auditor provides to its personnel who 
participate in the audit;
    <bullet> The other auditor's policies and procedures for ensuring 
that the firm and its personnel comply with independence and ethics 
requirements, including PCAOB Rule 3520, Auditor Independence; \117\
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    \117\ See also QC 20, System of Quality Control for a CPA Firm's 
Accounting and Auditing Practice.
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    <bullet> The other auditor's process for determining that the other 
auditor, including the firm and its applicable personnel, does not have 
financial or employment relationships that might impair the lead 
auditor's independence on the audit; \118\
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    \118\ See Rules 2-01(c)(1) and 2-01(c)(2) of Regulation S-X, 17 
CFR 210.2-01(c)(1) and 17 CFR 210.2-01(c)(2).
---------------------------------------------------------------------------

    <bullet> The other auditor's process for obtaining timely 
information about the audit client and its affiliates from which the 
other auditor firm is required to maintain independence, including an 
understanding of all non-audit services initiated or about to be 
initiated for the audit client by the other auditor; \119\ and
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    \119\ PCAOB and SEC independence rules define ``affiliate of the 
audit client.'' See PCAOB Rule 3501(a)(ii); Rule 2-01(f)(4) of 
Regulation S-X, 17 CFR 210.2-01(f)(4). For rules regarding the 
prohibition of non-audit services, see Rules 2-01(c)(4) and 2-01(b) 
of Regulation S-X, 17 CFR 210.2-01(c)(4) and 17 CFR 210.2-01(b); 
PCAOB Rule 3522, Tax Transactions; and PCAOB Rule 3523, Tax Services 
for Persons in Financial Reporting Oversight Roles. See also PCAOB 
Rule 3521, Contingent Fees.
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    <bullet> Any business relationships between the other auditor 
(including the firm and its applicable personnel) and the audit client, 
or persons associated with the audit client in a decision-making 
capacity, such as officers, directors, or substantial 
stockholders.\120\
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    \120\ See Rule 2-01(c)(3) of Regulation S-X, 17 CFR 210.2-
01(c)(3).
---------------------------------------------------------------------------

    Sources of relevant information about the other auditor may differ 
depending, for example, on whether the lead auditor and other auditor 
are affiliated with the same network of accounting firms. In practice, 
some networks have procedures for sharing among select personnel of 
their member firms certain information about the results of internal or 
external inspections of the affiliates, conducted either by the network 
itself or by outside parties such as the PCAOB.
    Commenters on the 2021 SRC generally supported the modifications 
made to proposed AS 2101.06D, including the requirement to obtain 
written affirmations from the other auditor about whether the other 
auditor's policies and procedures provide reasonable assurance of 
compliance with independence and ethics, and whether the other auditor 
is in compliance. However, some commenters asked the Board to modify 
the requirements for the written affirmation and noted that a firm's 
quality control assessment with respect to independence is done on an 
annual basis. These commenters recommended that the Board align the 
amendments in this rulemaking with those of the PCAOB's project 
regarding quality control standards.\121\ In the view of one of these 
commenters, it was not the Board's intention to require the other 
auditor engagement team members to make their own conclusion about an 
aspect of their firm's quality control system relative to a particular 
engagement.
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    \121\ Concept Release: Potential Approach to Revisions to PCAOB 
Quality Control Standards, PCAOB Release No. 2019-003 (Dec. 17, 
2019).
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    Even in circumstances when other auditor engagement team members 
rely on their firm's quality control system for independence and ethics 
compliance, the Board believes it is appropriate to require the lead 
auditor to request and obtain in the context of an audit an affirmation 
that the other auditor's firm has the necessary policies and 
procedures. In practice, audit engagement teams typically exchange 
information with their own firm's quality control function relating to 
compliance with certain independence and ethics requirements. However, 
if an other auditor does not have policies and procedures that provide 
reasonable assurance that it complies with such requirements, it is 
appropriate to require that the lead auditor request and obtain a 
description of how the other auditor determines its compliance with the 
independence and ethics requirements. The Board believes that this 
requirement is appropriate today and will remain appropriate after 
firms implement the IAASB's newly adopted International Standard on 
Quality Management 1 (``ISQM 1''), which will require firms that 
perform audits under IAASB standards to evaluate the effectiveness of 
its quality control system, or under PCAOB standards if the Board were 
to adopt a similar requirement.\122\
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    \122\ The IAASB adopted ISQM 1 in December 2020, and it will 
become effective on December 15, 2022. See IAASB, ISQM 1, Quality 
Management for Firms that Perform Audits or Reviews of Financial 
Statements, or Other Assurance or Related Services Engagements (Dec. 
17, 2020).

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[[Page 39697]]

    In addition, a couple of commenters suggested requiring that the 
lead auditor make the other auditor aware of PCAOB and SEC independence 
requirements that are relevant to the company.
    The requirement for the lead auditor to obtain an understanding 
(pursuant to paragraph .06Da) is designed to assist the lead auditor in 
determining its course of action regarding the other auditor's 
independence and ethics compliance. For example, other auditors with 
less knowledge and experience may be less able to provide the 
information the lead auditor needs to determine compliance with 
independence and ethics requirements. The lead auditor may need to 
communicate PCAOB and SEC independence requirements to some other 
auditors (e.g., those who are less familiar with the requirements) but 
not to others (e.g., those who are more familiar with the 
requirements). The Board believes the amendments are sufficiently 
principles-based to allow the lead auditor to adjust its procedures 
according to the circumstances of the audit, including with respect to:
    <bullet> Making other auditors aware of the relevant independence 
and ethics requirements for the audit engagement, including affirming 
compliance not only with respect to their audit client, but also with 
respect to any affiliates of that audit client;
    <bullet> Confirming that the other auditors understand the 
requirements; and
    <bullet> Considering whether additional information for other 
auditors is necessary regarding the independence and ethics 
requirements that are relevant to the audit engagement.
    With respect to AS 2101.06Dc(1)-(2), one commenter stated that it 
is not necessary for other auditors to reaffirm in writing every update 
that is communicated by the lead auditor. The Board believes that an 
informative record of relevant matters is important for determining 
compliance with independence and ethics requirements. Auditor 
independence is critical for an effective audit; lack of independence 
can compromise the effectiveness of audit procedures performed by the 
other auditor. The amendments are designed to provide the lead auditor 
with timely information indicating that the other auditor's 
independence may be compromised, thus enabling the lead auditor to take 
any necessary action during the course of the audit.
Obtaining a Written Description of the Other Auditor's Covered 
Relationships
See Paragraph .06Db(2) of AS 2101
    Under the amendments, the lead auditor should obtain from the other 
auditor and review a written description of all relationships between 
the other auditor and the audit client or persons in financial 
reporting oversight roles at the audit client \123\ that may reasonably 
be thought to bear on independence pursuant to the requirements of 
paragraph (b)(1) of PCAOB Rule 3526, Communication with Audit 
Committees Concerning Independence.\124\ The requirement is designed to 
assist the lead auditor in obtaining information for determining 
compliance with SEC and PCAOB independence requirements and to 
facilitate auditor communications to the audit committee under Rule 
3526. The amendments do not change the applicability of Rule 3526 to 
the lead auditor's representation, including with respect to 
unaffiliated firms.\125\
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    \123\ PCAOB Rule 3501, Definitions of Terms Employed in Section 
3, Part 5 of the Rules, defines the terms ``audit client'' and 
``financial reporting oversight role.'' The terms used in AS 
2101.06Db(2) have the same meaning as defined in Rule 3501.
    \124\ Rule 3526 requires auditors to make certain communications 
to the audit committee of the audit client before accepting an 
initial engagement, and annually thereafter, including a 
description, in writing, of ``all relationships between the 
registered public accounting firm or any affiliates of the firm and 
the audit client or persons in financial reporting oversight roles 
at the audit client that, as of the date of the communication, may 
reasonably be thought to bear on independence.'' See also Staff 
Guidance, Rule 3526(b) Communications with Audit Committees 
Concerning Independence (May 31, 2019), which addresses questions 
that have arisen in practice regarding application of Rule 3526(b) 
in certain circumstances.
    \125\ See Ethics and Independence Rule 3526, Communication with 
Audit Committees Concerning Independence, PCAOB Release No. 2008-003 
(Apr. 22, 2008), at 5 note 4, which states that the Board ``expects 
the primary auditor's report to either include any covered 
relationships of any secondary auditors not affiliated with the firm 
or state that it does not do so'' (emphasis added).
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    One commenter supported the proposed requirement, noting that PCAOB 
Rule 3526 requires communication only from the lead auditor to the 
audit committee. The commenter added that the proposed new 
requirement--with respect to the lead auditor determining an other 
auditor's compliance with independence and ethics requirements rather 
than simply inquiring about it (e.g., under extant AS 1205)--aligns the 
responsibility to make such determination better with the required 
communication.
    No commenters opposed this requirement, and the Board adopted it as 
proposed.
Obtaining a Written Affirmation About the Other Auditor's Compliance 
With Independence and Ethics Requirements
See Paragraph .06Db(3) of AS 2101
    Under the amendments, the lead auditor should obtain from the other 
auditor and review a written affirmation as to whether the other 
auditor is in compliance with independence and ethics requirements with 
respect to the audit client, and if it is not in compliance, the lead 
auditor should obtain and review a written description of the nature of 
the instances of non-compliance. This requirement was originally 
introduced in the 2016 Proposal, to strengthen a requirement in AS 
1205, which is being rescinded, to make inquiries concerning the other 
auditor's independence.\126\ This provision was revised and clarified 
in the amendments proposed in the 2017 and 2021 SRCs to require in 
addition that the lead auditor obtain and review a description of the 
nature of the instances of any non-compliance.
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    \126\ See AS 1205.10b.
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    One commenter on the 2021 SRC recommended that the Board modify the 
proposed requirement to also include the other auditor's conclusion 
regarding whether it is capable of exercising objective and impartial 
judgment on all issues encompassed in its work. In response, the Board 
noted that the lead auditor can determine its course of action based on 
the facts and circumstances of the audit engagement, without the Board 
prescribing a course of action in the amendments. Therefore, the Board 
did not make additional changes to this requirement and adopted it as 
proposed.
Following Up on Contrary Information
See Paragraph .06F of AS 2101
    The amendments to AS 2101 direct the lead auditor to follow up on 
contrary information. The amendments provide that if the lead auditor 
becomes aware of information that contradicts the other auditor's 
affirmation or description (including information about changed 
circumstances), the lead auditor should investigate the circumstances 
and consider the reliability of the affirmation or description. 
Further, if, after such investigation, or based on the other auditor's 
affirmation or description, there are indications that the other 
auditor is not in compliance with independence and ethics requirements, 
the lead auditor should consider the implications for fulfilling its 
own responsibilities under AS 2101.06b and PCAOB Rules 3520 and 3526.
    Two commenters on the 2021 SRC expressed concerns with the words 
``investigate'' and ``investigation'' in the proposed amendments. The 
Board notes that the terms are used in other PCAOB auditing standards 
and generally refer to

[[Page 39698]]

taking a closer look at a matter to determine a further course of 
action.\127\ After considering the comments, the Board adopted this 
requirement as proposed.
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    \127\ See, e.g., paragraphs .17, .20-.21 of AS 2305, Substantive 
Analytical Procedures (investigation and evaluation of significant 
differences from expectations about assertions related to the 
financial statements).
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Obtaining Information at the Individual or Firm Level
See Note to Paragraph .06D of AS 2101
    The amendments include a note to AS 2101.06D stating that 
information required to be provided to the lead auditor under AS 
2101.06D may cover the other auditor's firm and engagement team members 
who are partners, principals, shareholders, or employees of the other 
auditor firm.
    Some commenters on the proposing releases questioned the 
practicability of applying the requirements to individual engagement 
team members. Further, one commenter on the 2021 SRC specifically asked 
for clarification regarding the level (i.e., firm, individual, or both) 
at which the lead auditor is expected to apply the requirements in 
paragraph .06Da (obtaining an understanding of other auditors' 
knowledge and experience) and how to interpret the proposed note to 
paragraph .06D.
    The definition of ``other auditor'' in the amended standards 
includes both an other auditor firm and individuals at that firm. The 
affirmations and descriptions required by the amendments could be 
prepared and provided by the other auditor firm and address all covered 
relationships. In our experience, firms typically have the necessary 
information available centrally, including information about processes 
for determining compliance with independence and ethics requirements, 
and about individuals at the firm, including their level of experience 
in applying the requirements. Obtaining from a firm a written 
affirmation or description that also encompasses relevant individuals 
at the firm would satisfy the requirement to obtain a written 
affirmation or description ``from the other auditor'' for those persons 
at that firm.
PCAOB Registration Status of Other Auditors
See Paragraph .06G of AS 2101
    PCAOB Rule 2100, Registration Requirements for Public Accounting 
Firms, requires a public accounting firm to be registered with the 
PCAOB \128\ if it: (a) prepares or issues any audit report with respect 
to any issuer, broker, or dealer or (b) plays a substantial role in the 
preparation or furnishing of an audit report with respect to any 
issuer, broker, or dealer.\129\ However, there have been examples of 
firms that played a substantial role but were not registered with the 
PCAOB.\130\
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    \128\ See also Section 102(a) of Sarbanes-Oxley, 15 U.S.C. 
7212(a).
    \129\ An other auditor that is not registered with the PCAOB 
(regardless of whether such auditor is required to be registered 
with the PCAOB) is nonetheless subject to PCAOB authority when it 
acts as a person associated with a registered public accounting 
firm. See Section 2(a)(9) of Sarbanes-Oxley, 15 U.S.C. 7201(a)(9)); 
PCAOB Rule 1001(p)(i) (defining ``person associated with a public 
accounting firm''); see also Sections 104(c)(1), 105(b)(1), and 
105(c)(4) of Sarbanes-Oxley, 15 U.S.C. 7214(c)(1), 15 U.S.C. 
7215(b)(1), and 15 U.S.C. 7215(c)(4) (articulating that PCAOB 
authority extends to ``persons associated with a registered public 
accounting firm'' in connection with inspections, investigations, 
and sanctions, respectively).
    \130\ See, e.g., In the Matter of WWC, P.C., PCAOB Release No. 
105-2022-006 (Apr. 19, 2022); BDO Canada LLP (f/k/a BDO Dunwoody 
LLP), SEC AAER No. 3926 (Mar. 13, 2018); KPMG Inc., SEC AAER No. 
3927 (Mar. 13, 2018).
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    The amendments provide that the lead auditor may use the work of an 
other auditor that plays a substantial role on the audit \131\ only if 
the other auditor is registered with the PCAOB.\132\ The provision is 
intended to promote compliance with Rule 2100 and thereby enhance audit 
quality, and it does not change the rule or the related definition of 
``play a substantial role'' in Rule 1001(p)(ii). Several commenters 
supported the provision, and the Board adopted it as proposed.
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    \131\ See PCAOB Rule 1001(p)(ii).
    \132\ For audits in which the lead auditor divides 
responsibility for the audit with the referred-to auditor see AS 
1206.06c in this document. See also discussion below.
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    With regard to registration requirements more broadly, one 
commenter suggested--as an alternative to requirements concerning 
independence and ethics, and concerning knowledge, skill, and ability--
that the Board require all audit firms ``engaged in a public entit[y] 
assurance engagement'' to be registered with the PCAOB. In the 
commenter's view, this approach would provide a ``basis for consistent 
application [of PCAOB standards] for firms registered with the PCAOB.'' 
The Board is not taking the commenter's suggestion because simply 
requiring firms to register (beyond the current registration 
requirements) would not address the need for change identified in this 
rulemaking. The shortcoming of this approach is demonstrated by the 
inspection deficiencies and enforcement cases described above, which 
involve conduct by registered firms during audits involving other 
auditors.
Knowledge, Skill, and Ability of and Communications With Other Auditors
See Paragraphs .06H and .16 of AS 2101
Knowledge, Skill, and Ability of Other Auditors
See Paragraphs .06Ha-b and .16 of AS 2101
    The amendments require that, with respect to each other auditor, 
the lead auditor obtain an understanding of the knowledge, skill, and 
ability of the other auditor's engagement team members who assist the 
lead auditor with planning or supervision, including their: experience 
in the industry in which the company operates; knowledge of the 
relevant financial reporting framework, PCAOB standards and rules, and 
SEC rules and regulations; and experience in applying the standards, 
rules, and regulations. The amendments also require the lead auditor to 
obtain a written affirmation from the other auditor that its engagement 
team members possess the knowledge, skill, and ability to perform their 
assigned tasks.\133\
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    \133\ The written affirmation required by AS 2101.06Hb regarding 
the other auditor's engagement team members does not need to 
identify each member of the engagement team.
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    PCAOB standards have long recognized the importance of technical 
training and proficiency of the personnel performing the audit.\134\ 
These matters are particularly important for senior engagement 
personnel because of their role in planning the audit, supervising the 
work of other engagement team members, and making important 
professional judgments.
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    \134\ See, e.g., AS 1010, Training and Proficiency of the 
Independent Auditor, and paragraphs .11-.12 of QC 20, System of 
Quality Control for a CPA Firm's Accounting and Auditing Practice.
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    Under existing PCAOB standards, in situations where the lead 
auditor supervises an other auditor under AS 1201, the knowledge, 
skill, and ability of engagement team members with significant 
engagement responsibilities should be commensurate with the assessed 
risks of material misstatement.\135\ In situations where the lead 
auditor uses the other auditor's work and report under AS 1205, the 
lead auditor \136\ is required under existing standards to make 
inquiries concerning the professional reputation of the other 
auditor.\137\
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    \135\ See AS 2301.05a.
    \136\ ``Principal auditor'' is the term used in rescinded AS 
1205.
    \137\ See AS 1205.10.

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[[Page 39699]]

    The amendments build on and strengthen the existing provisions. 
Compliance with these amendments is not limited to preliminary 
engagement activities and should be reevaluated with changes in 
circumstances. The amendments seek to apply a balanced and practical 
approach by focusing the lead auditor's attention primarily on the 
knowledge, skill, and ability of the more senior engagement team 
members of the other auditor.
    Obtaining an understanding of the knowledge, skill, and ability of 
the other auditor's supervisory personnel is important for determining 
the extent of the lead auditor's supervision of the other auditor's 
work. As a practical matter, the knowledge, skill, and ability of the 
supervisory personnel include their experience in the company's 
industry and jurisdiction,\138\ and knowledge of the relevant financial 
reporting framework, PCAOB standards and rules, and SEC rules and 
regulations. Lack of appropriate knowledge, skill, and ability by the 
other auditor's supervisory personnel can have an adverse effect on the 
overall quality of the audit.
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    \138\ As discussed below, AS 2101.16 states that the auditor 
should determine whether specialized skill or knowledge is needed to 
perform appropriate risk assessments, plan or perform audit 
procedures, or evaluate audit results, and the amendments specify 
that such specialized skill or knowledge may include ``relevant 
knowledge of foreign jurisdictions.''
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    Several commenters supported the proposed requirements, including 
the requirement to obtain a written affirmation from the other auditor 
that its engagement team members possess the knowledge, skill, and 
ability to perform their assigned tasks. One commenter asked the Board 
to consider providing that the lead auditor's procedures for obtaining 
an understanding of the knowledge, skill, and ability of the other 
auditor be scalable based on the considerations regarding sufficiency 
of participation in AS 2101.06A. The Board noted that the requirements 
in AS 2101.06A serve a different purpose: to increase the likelihood 
that the firm issuing the auditor's report meaningfully participates in 
the audit. The requirements regarding the knowledge, skill, and ability 
are designed to focus the lead auditor and other auditors on assigning 
qualified personnel at all levels of the audit engagement.
    Another commenter suggested inserting a note after paragraph .06H 
that indicates the lead auditor's own experience working with the other 
auditor is relevant to the lead auditor's understanding of the other 
auditor's knowledge, skill, and ability. The Board agrees with the 
commenter that the lead auditor's own experience with the other auditor 
may be a source of information about the other auditor's knowledge, 
skill, and ability. However, the amendments are designed to be 
principles-based to accommodate a variety of scenarios in practice, 
whereby differing types of information about other auditors can be 
available to the lead auditor. Therefore, beyond requiring the written 
affirmation described above, the amendments do not prescribe a 
particular set of procedures or sources of information for obtaining an 
understanding of the other auditor's knowledge, skill, and ability. The 
amendments allow the lead auditor to determine the nature and extent of 
its procedures in this area. After considering the comments, the Board 
adopted the requirements as proposed.
    The amendments also add an explanatory phrase, ``including relevant 
knowledge of foreign jurisdictions,'' to AS 2101.16's existing 
requirement that the auditor should determine whether specialized skill 
or knowledge is needed to perform appropriate risk assessments, plan or 
perform audit procedures, or evaluate audit results.\139\ Identifying 
whether there is a need for specialized skill or knowledge is logically 
a prerequisite to evaluating whether someone has that skill or 
knowledge. For example, a lead auditor in its home jurisdiction may not 
have a sufficient understanding of the business practices or legal 
requirements of a foreign jurisdiction to be able to execute the audit 
effectively. In these cases, the lead auditor may want to consider 
whether to engage an other auditor (e.g., from that jurisdiction) with 
relevant knowledge of the foreign jurisdiction to appropriately assess 
risk, plan or perform audit procedures, or evaluate audit results.
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    \139\ See amended paragraph .16 of AS 2101, which provides that 
``[t]he auditor should determine whether specialized skill or 
knowledge, including relevant knowledge of foreign jurisdictions, is 
needed to perform appropriate risk assessments, plan or perform 
audit procedures, or evaluate audit results.''
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    One commenter on the 2021 SRC stated that, if added focus on 
knowledge of foreign jurisdictions is needed, additional clarity should 
be provided as to when this knowledge is needed and how it should be 
obtained. Another commenter stated that consideration of relevant 
knowledge of foreign jurisdictions may be applicable only in certain 
circumstances but acknowledged the possible need for specialized 
knowledge of foreign jurisdictions because of the other auditor's 
knowledge of the regulatory environment.
    Similar to AS 2101.06Ha-b, the amendment in AS 2101.16 allows the 
auditor to determine the nature and extent of its procedures when 
determining whether specialized skill or knowledge is needed on the 
audit. After considering the comments, the Board adopted the amendment 
as proposed.
Communication With Other Auditors
See Paragraph .06Hc of AS 2101
    The amendments to AS 2101 require the lead auditor to determine, in 
connection with using the other auditor's work, that it is able to 
communicate with the other auditor and gain access to the other 
auditor's audit documentation. The requirement is intended to help the 
lead auditor in identifying and addressing any communication or access 
issues early in the audit. For example, the lead auditor would consider 
whether it can have meaningful two-way communication with the other 
auditor \140\ and whether it needs to address any language differences. 
In another example, the lead auditor would consider whether it can 
access the other auditor's documentation remotely.
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    \140\ See, e.g., AS 2110.49-.53 (describing discussions among 
key engagement team members regarding risks of material 
misstatement).
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    The amendment also is based on the existing provisions of PCAOB 
standards that require the lead auditor to have access to the other 
auditor's documentation and obtain, review, and retain certain portions 
of it. As with the existing requirements, the amendments allow the lead 
auditor flexibility in determining the means of access (e.g., remotely 
or on-site).\141\
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    \141\ See, e.g., rescinded AS 1205.12. See also AS 1215.18-.19.
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    If the lead auditor cannot obtain sufficient appropriate audit 
evidence because of restrictions on communicating with the other 
auditor or accessing its documentation, a limitation on the scope of 
the audit may exist. Under PCAOB standards, these circumstances may 
require the lead auditor to qualify the audit opinion or disclaim an 
opinion.\142\
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    \142\ See AS 2810.35. See also paragraphs .05-.17 of AS 3105, 
Departures from Unqualified Opinions and Other Reporting 
Circumstances, which contains requirements regarding audit scope 
limitations.
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    Those who commented on the proposed requirement in the 2016 
Proposal and 2017 SRC viewed it as a clear requirement. Some commenters 
asked for examples of acceptable modes of communication between the 
lead auditor and the other auditor, and

[[Page 39700]]

inquired whether email communication would be acceptable. The Board 
notes that the form of communication between auditors (e.g., oral or 
written) depends on the circumstances of the audit and professional 
requirements (e.g., PCAOB standards require that certain communications 
between the lead auditor and other auditor be in writing \143\). 
Although PCAOB standards do not prescribe a particular type of written 
communication (e.g., print or electronic), they require that audit 
documentation, in whatever form, contain sufficient information to 
enable an experienced auditor, having no previous connection with the 
engagement, to understand the nature, timing, extent, and results of 
the procedures performed, evidence obtained, and conclusions 
reached.\144\ In addition, the other auditor's audit documentation must 
be accessible by the lead auditor.\145\ Further, audit documentation 
should demonstrate that the engagement complied with the standards of 
the PCAOB.\146\
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    \143\ See, e.g., AS 1215.19.
    \144\ See AS 1215.06a.
    \145\ See AS 1215.18, as amended.
    \146\ See AS 1215.05a.
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    Consistent with the above discussion, the Board adopted the 
amendment as proposed.
Determining Locations or Business Units at Which Audit Procedures 
Should Be Performed
See Paragraph .14 of AS 2101
    Other auditors are often involved in audits of companies with 
operations in multiple locations or business units (``multi-location 
engagements''). In these circumstances, existing AS 2101.11-.13 address 
the determination of the locations at which audit procedures should be 
performed and the nature, timing, and extent of the audit procedures. 
Existing AS 2101.14 provides that, in situations in which AS 1205 
applies, the auditor should perform the procedures in paragraphs 
.11-.13 to determine the locations or business units where audit 
procedures should be performed.
    In light of the rescission of AS 1205, the Board amended AS 2101.14 
to specify that, in an audit involving other auditors or referred-to 
auditors, the lead auditor should perform the procedures set forth in 
AS 2101.11-.13 to determine the locations or business units at which 
audit procedures should be performed. The amendment to AS 2101.14, 
together with the amended supervisory requirements in AS 1201, is 
intended by the Board to require that the lead auditor play the central 
role in determining the scope of the audit.
    One commenter on the 2021 SRC recommended that the Board remove the 
requirements in proposed AS 2101.14 with regard to referred-to auditors 
because these requirements are not consistent with the principles 
underlying dividing responsibility (i.e., the approach would diminish 
the line between assuming and dividing responsibility). The Board noted 
that the amendment to this paragraph is consistent with the relevant 
requirements in existing AS 2101.14 applicable to audits that involve 
divided responsibility. For audits involving referred-to auditors, new 
AS 1206 describes interactions, including communication of the lead 
auditor's plan to divide responsibility, and other measures to assure 
the coordination of activities between the lead auditor and the 
referred-to auditor when dividing responsibility.\147\
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    \147\ See discussion below.
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    After considering the comments, the Board adopted the amendment as 
proposed.
Supervising Other Auditors
Overview of the Supervisory Approach
    The Board's amendments are intended to improve the quality of 
audits that involve other auditors for whose work the lead auditor 
assumes responsibility by requiring, among other things, that the lead 
auditor supervise the other auditors under AS 1201, as amended.
    Currently, the risk-based supervision approach described in AS 1201 
does not apply to situations in which the lead auditor uses the work 
and reports of other auditors under AS 1205. AS 1205, which the Board 
rescinded, requires the lead auditor \148\ to perform certain 
procedures, when using the work and reports of other auditors, that are 
more limited in scope than those required by the supervision standard, 
AS 1201. The amendments are designed to improve the lead auditor's 
oversight of other auditors by applying AS 1201 to all audits involving 
other auditors for whose work the lead auditor assumes 
responsibility.\149\ The amendments also supplement the general 
supervisory requirements in AS 1201.05 by providing direction for 
applying these requirements in an audit involving other auditors.\150\
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    \148\ ``Principal auditor'' is the term used in AS 1205.
    \149\ For situations in which the lead auditor divides 
responsibility for the audit with another accounting firm, see AS 
1206. For certain audits involving investments accounted for under 
the equity method of accounting whose financial statements are 
audited by other auditors, see proposed rule text for changes to 
Appendix B of AS 1105.
    \150\ See AS 1201.07-.15.
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    AS 1201 currently sets forth the general framework for supervision 
of engagement team members, including the nature and extent of 
supervisory activities. The standard allows the engagement partner to 
seek assistance in fulfilling his or her supervisory responsibilities 
from appropriate engagement team members, which includes team members 
from other firms involved in the audit.\151\ While AS 1201 describes 
supervisory activities, it does not, however, describe supervisory 
procedures or assign them to a particular member, or members, of the 
engagement team. Further, the standard does not differentiate between 
the supervisory responsibilities of engagement team members at the lead 
auditor and at the other auditor.
---------------------------------------------------------------------------

    \151\ See AS 1201.04.
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    Under PCAOB standards, the audit firm that issues the audit report 
is responsible for making sure that sufficient appropriate audit 
evidence has been obtained, and appropriately evaluated, to support the 
opinion in the audit report.\152\ Because of the lead auditor's central 
role in the audit, the amendments the Board adopted require that 
certain supervisory procedures be performed by the lead auditor. These 
procedures are designed to improve the effectiveness of the lead 
auditor's supervision of the work of other auditors.
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    \152\ See AS 2810 regarding evaluating the sufficiency and 
appropriateness of audit evidence.
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    The amendments also are designed to be scalable by applying the 
existing principles in AS 1201, which are already familiar to auditors. 
When designing and performing supervisory activities the lead auditor 
determines the extent of supervision of the other auditors' work in 
accordance with paragraph .06 of AS 1201, which describes the factors 
to take into account when determining the extent of supervision 
necessary.\153\ For example, the extent of the lead auditor's 
supervision of the other auditors' work depends on, among other things, 
the risks of material misstatement to the company's financial 
statements and the knowledge, skill, and ability of the other 
auditors.\154\
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    \153\ See AS 1201.07.
    \154\ See AS 1201.06.
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    The lead auditor may determine that the necessary extent of 
supervision of the other auditor's work under AS 1201 entails 
performing supervisory procedures beyond those specified in

[[Page 39701]]

the amendments. For procedures not assigned to the lead auditor under 
the amendments, the lead auditor may seek assistance from qualified 
engagement team members (including those at the other auditor) in 
supervising the work.\155\ The approach to supervising other auditors 
under the amendments is consistent with, and takes into account, recent 
developments at some accounting firms that have been observed through 
the Board's oversight activities.\156\
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    \155\ See AS 1201.04.
    \156\ See further discussion above.
---------------------------------------------------------------------------

    Many commenters on the 2021 SRC noted that communications between 
the lead auditor and other auditors are iterative throughout the audit. 
In addition, some commenters stated that it was not clear to them 
whether under the amendments in the 2021 SRC other auditors can provide 
input to the lead auditor on certain issues.
    The Board agrees with commenters that effective supervision by the 
lead auditor typically necessitates two-way communication with the 
other auditor. Similar to the amendments proposed in the 2021 SRC, the 
final amendments are designed to foster effective interaction by 
requiring the lead auditor to, as necessary, hold discussions with and 
obtain information from the other auditors to facilitate the 
performance of the supervisory procedures.\157\
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    \157\ See, e.g., note to AS 1201.08 and AS 1201.10 (requiring 
the lead auditor to discuss with the other auditor any changes to 
its planned audit procedures), both of which were originally 
introduced in the 2016 Proposal. In addition, the amendments include 
a reference to paragraphs .49-.53 of AS 2110, Identifying and 
Assessing Risks of Material Misstatement (in a footnote to AS 
1201.08) to remind the lead auditor of certain other required 
interactions with the other auditor. See discussion below.
---------------------------------------------------------------------------

    The amendments to AS 1201 do not include the statement contained in 
rescinded AS 1205.03 that ``the other auditor remains responsible for 
the performance of his own work and for his own report.'' Nevertheless, 
the Board believes that supervision by the lead auditor does not 
relieve other auditors of their responsibilities, which include 
applying due professional care and complying with PCAOB standards. To 
reinforce this principle, the amendments add a statement to AS 1015, 
that other auditors are responsible for performing their work with due 
professional care.\158\ This statement reminds other auditors of their 
responsibility to perform work in compliance with PCAOB rules and 
standards.\159\ Commenters were supportive of this added statement, 
noting that it was clear and appropriate. That responsibility is 
further emphasized by (i) an amendment requiring an affirmation from 
the other auditor about its compliance with the lead auditor's 
instructions \160\ and (ii) an amendment regarding audit documentation 
requirements.\161\ The overall responsibility for the audit under the 
amendments remains, however, with the lead auditor, as is the case 
under the existing standards.\162\
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    \158\ See note to AS 1015.01 (``For audits that involve other 
auditors, the other auditors are responsible for performing their 
work with due professional care.'').
    \159\ This amendment would not, of course, establish the sole 
responsibilities of other auditors. Like all auditors that 
participate in an audit performed under PCAOB standards, other 
auditors must comply with all applicable PCAOB standards. See, e.g., 
PCAOB Rule 3100, Compliance with Auditing and Related Professional 
Practice Standards.
    \160\ See AS 1201.11, which is discussed below.
    \161\ See AS 1215.18, which is discussed below.
    \162\ To emphasize this point, the amendments add a footnote to 
AS 1015.01, referring to AS 2101 and AS 1201, which set forth the 
lead auditor's responsibilities for planning and supervising the 
other auditor's work.
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Supervisory Procedures To Be Performed by the Lead Auditor
    Under the amendments to AS 1201, the engagement partner remains 
responsible for the engagement and its performance. Accordingly, the 
engagement partner is responsible for proper supervision of the work of 
engagement team members, including the work of engagement team members 
outside the engagement partner's firm. In fulfilling his or her 
supervisory responsibilities, the engagement partner may seek 
assistance from appropriate engagement team members, including 
engagement team members outside the engagement partner's firm. 
Engagement team members who assist the engagement partner with 
supervision should exercise their supervisory responsibilities in 
accordance with AS 1201.
    With respect to the lead auditor's supervisory procedures in the 
amendments, other engagement team members who both: (1) are partners, 
principals, shareholders, or employees of the registered public 
accounting firm issuing the auditor's report (or individuals who work 
under that firm's direction and control and function as the firm's 
employees); and (2) assist the engagement partner in fulfilling his or 
her planning or supervisory responsibilities on the audit pursuant to 
planning and supervision, are eligible to perform such procedures. In 
addition, in multi-tiered audits, the lead auditor may seek assistance 
from a first other auditor in performing the supervisory procedures in 
the amendments.\163\
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    \163\ See AS 1201.14.
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    To provide more specific direction for supervising the other 
auditors' work, the amendments to AS 1201 establish requirements for 
the lead auditor in the following areas:
    <bullet> Informing other auditors of their responsibilities;
    <bullet> Obtaining and reviewing a description of the audit 
procedures to be performed by other auditors;
    <bullet> Obtaining and reviewing a written affirmation that other 
auditors performed their work in accordance with the lead auditor's 
instructions;
    <bullet> Directing other auditors to provide specific documentation 
regarding their work; and
    <bullet> Determining whether other auditors have performed the work 
assigned to them, and whether additional evidence should be obtained.
    As noted in AS 1201.07, these requirements supplement the 
requirements in AS 1201.05. The requirements imposed by the amendments 
are described in new paragraphs AS 1201.08-.13 and discussed in more 
detail below.\164\
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    \164\ The amendments also specify certain supervisory 
responsibilities in multi-tiered audits, as discussed below.
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Informing Other Auditors of Their Responsibilities
See Paragraph .08 of AS 1201
    AS 1201 currently requires that engagement team members be informed 
of their responsibilities, including the objectives and the nature, 
timing, and extent of the procedures to be performed, and other 
relevant matters.\165\ For audits performed in accordance with AS 1205, 
the standard does not include a specific requirement for the lead 
auditor to inform other auditors of their responsibilities.\166\
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    \165\ See AS 1201.05a.
    \166\ According to AS 1205.12, the lead auditor (or ``principal 
auditor'' in its terminology) should consider, among other things, 
reviewing the audit programs of the other auditor and issuing 
instructions to the other auditor as to the scope of audit work.
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    To promote effective supervision of other auditors' work by the 
lead auditor, the amendments to AS 1201 specifically require the lead 
auditor to inform other auditors in writing of the following matters:
    <bullet> The scope of work to be performed by the other auditor 
(e.g., location or business unit \167\ and the general type of

[[Page 39702]]

work to be performed, which could range from a few specified audit 
procedures to a standalone audit); and
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    \167\ As discussed above, in multi-location engagements that 
involve other auditors, the lead auditor is required to determine 
locations or business units at which audit procedures should be 
performed.
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    <bullet> With respect to the work requested to be performed: the 
identified risks of material misstatement,\168\ tolerable 
misstatement,\169\ and the amount (if determined) below which 
misstatements are clearly trivial and do not need to be 
accumulated.\170\
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    \168\ See AS 2110.49-.53 (referenced in a footnote to AS 
1201.08), which requires key engagement team members (including 
those in differing locations) to hold discussions regarding risks of 
material misstatement due to error or fraud, which inform the 
identification and assessment of risks. The Board has adopted an 
additional reference reminding auditors of the requirements in AS 
2110.59 regarding the auditor's responsibility to identify and 
assess the risks of material misstatement at the (consolidated) 
financial statement level and the assertion level.
    \169\ See AS 2105.08-.10 (referenced in a footnote to AS 
1201.08), which describe determining the amount or amounts of 
tolerable misstatement, including for the individual locations or 
business units, where applicable. As noted above, it is common for 
audits using other auditors to take place in different locations, 
including different countries.
    \170\ See AS 2810.10-.11 (referenced in a footnote to AS 
1201.08), which require auditors to accumulate misstatements 
identified during the audit, other than those that are clearly 
trivial, and provide that auditors may designate an amount below 
which misstatements are trivial and do not need to be accumulated. 
The requirement in the amendments indicates that the lead auditor 
makes the determination of the clearly trivial threshold under AS 
2810, if such a threshold is determined.
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    Some commenters on the 2016 Proposal and the 2017 SRC interpreted 
the proposed amendments as requiring the lead auditor to communicate to 
other auditors all the risks of material misstatement for the location 
or business unit, or even all identified risks of material misstatement 
to the consolidated financial statements. Some of those commenters 
(some of whom also commented on the 2021 SRC) recommended that the lead 
auditor be required to communicate only the significant risks or only 
risks that are relevant to the other auditors' work. Some commenters 
agreed that the communication by the lead auditor to the other auditor 
about the scope of work, identified risks of material misstatement, and 
the amount (if determined) below which misstatements are clearly 
trivial and do not need to be accumulated, should be in writing.
    In the 2021 SRC, the Board agreed with commenters who stated that 
the lead auditor should communicate to other auditors those risks to 
the consolidated financial statements that are relevant to the other 
auditors' work. The Board therefore included in AS 1201.08b in the 2021 
SRC the qualifying phrases ``[w]ith respect to the work requested to be 
performed'' and ``to the consolidated financial statements that are 
associated with the location or business unit.'' \171\ These phrases 
remain in the final amendments. The amendments do not limit the lead 
auditor's communication to significant risks (as some commenters 
suggested) because doing so could lead to inadequate testing of 
significant accounts and disclosures where a reasonable possibility of 
material misstatement to the financial statements exists.
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    \171\ To align with similar language in AS 2101.11, the 
amendments have been revised from the 2021 SRC in AS 1201.08b(1) to 
change ``the identified risks ... that are applicable to the 
location or business unit'' to ``associated with the location or 
business unit.''
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    Some commenters on the proposing releases also questioned whether 
the lead auditor is always best suited to assess risks of material 
misstatement at locations or business units audited by other auditors. 
Further, a couple of commenters to the 2021 SRC recommended that the 
amendments not require the lead auditor to communicate identified risks 
of material misstatements that are applicable to the location or 
business unit. Instead, the commenters recommended a requirement that 
focuses the lead auditor on communicating identified risks to the 
consolidated financial statements and matters that would assist the 
other auditor in developing a more granular view of risks specific to 
the location or business unit.
    Although requiring the lead auditor to communicate to the other 
auditor the relevant risks of material misstatement to the company's 
financial statements is consistent with the lead auditor's 
responsibilities under PCAOB standards, existing PCAOB standards also 
recognize that additional risks of material misstatement to the 
company's financial statements may be identified by other auditors, who 
could be more familiar than the lead auditor with a particular location 
or business unit where such risks may originate.\172\
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    \172\ See AS 2110.49-53.
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    The Board agrees with commenters that input from other auditors may 
be necessary in identifying and assessing risks of material 
misstatement to the company's financial statements and developing an 
audit response. The amendments are designed to foster effective two-way 
communication by requiring the lead auditor to, as necessary, hold 
discussions with and obtain information from other auditors to 
facilitate the performance of the supervisory procedures.\173\ Notably, 
all key engagement team members, including those at the other auditor 
firms, are already required under existing standards to discuss the 
susceptibility of the company's financial statements to material 
misstatement due to error or fraud, as part of performing the risk 
assessment procedures.\174\ A reminder about these requirements is 
included in a footnote to AS 1201.08.\175\
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    \173\ A note to AS 1201.08 provides that the lead auditor 
should, as necessary, hold discussions with and obtain information 
from the other auditor to facilitate the performance of procedures 
described in paragraph .08.
    \174\ See AS 2110.49-.53.
    \175\ See footnote 15 to AS 1201.08, citing AS 2110.49-.53, 
which require key engagement team members (including those in 
differing locations) to hold discussions regarding risks of material 
misstatement due to error or fraud, which inform the identification 
and assessment of risks.
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    The Board also agrees with commenters that under the existing 
requirements the lead auditor identifies and assesses the risk of 
material misstatement at the level of the company's (consolidated) 
financial statements. An additional reference was added to the 
amendments reminding lead auditors of the existing requirements of AS 
2110.59 to identify and assess the risks of material misstatement at 
the financial statement level and assertion level.\176\
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    \176\ See footnote 15 to AS 1201.08.
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Obtaining and Reviewing a Written Description of the Audit Procedures 
To Be Performed by the Other Auditors
See Paragraphs .09 and .10 of AS 1201
    Existing PCAOB standards require that the auditor develop and 
document an audit plan that includes a description of, among other 
things, the planned nature, timing, and extent of the risk assessment 
procedures, tests of controls, and substantive procedures.\177\ In 
addition, pursuant to AS 1201, the auditor is required to inform 
engagement team members of their responsibilities, including the 
nature, timing, and extent of procedures they are to perform.\178\ In 
situations governed by AS 1205, the lead auditor is required to 
consider reviewing the audit programs of the other auditor.\179\
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    \177\ See AS 2101.10.
    \178\ See AS 1201.05a(2).
    \179\ See rescinded AS 1205.12.
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    Similar to the proposed amendments in the 2021 SRC, the final 
amendments to AS 1201 require the lead auditor to obtain and review the 
other auditor's written description of audit procedures to be 
performed,\180\ determine whether any changes to the other auditor's 
planned audit procedures are necessary, and if so, discuss the changes 
with, and communicate them in writing to, the

[[Page 39703]]

other auditor.\181\ Under these amendments, the lead auditor is 
required to inform the other auditor of the level of detail needed in 
the other auditor's written description of audit procedures to be 
performed, based on the necessary extent of the lead auditor's 
supervision.
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    \180\ See AS 1201.09.
    \181\ See AS 1201.10.
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    The amendments are intended to promote proper supervision of the 
other auditor's work by the lead auditor and proper coordination of 
work performed by the lead and other auditor. Importantly, the 
amendments are designed to accommodate different scenarios encountered 
in practice. For example, the other auditor who is more familiar than 
the lead auditor with a location or business unit may be better 
positioned to design detailed audit procedures for that part of the 
audit (which procedures would then be subject to the lead auditor's 
review and approval). Conversely, an other auditor who lacks experience 
in addressing certain risks may not be best suited to plan the work or 
to design detailed audit procedures in that area. The amendments 
provide that as the necessary extent of supervision increases, the lead 
auditor, rather than the other auditor, may need to determine the 
nature, timing, and extent of procedures to be performed by the other 
auditor.\182\
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    \182\ See note to AS 1201.09.
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    Many commenters on the 2021 SRC recommended that these requirements 
for the lead auditor be more principles-based to better accommodate an 
iterative process of communication between the lead auditor and other 
auditors, and the use of communication technology. For example, some 
commenters indicated that planned audit procedures and related changes 
could be communicated through video conferencing and screen sharing 
instead of in writing. These commenters encouraged the Board to revise 
AS 1201.09 and .10 to make them more principles-based and to reflect 
the recent technological innovations in communication. A couple of 
commenters went further and recommended removing from the amendments 
the requirement to ``obtain'' the information. A couple of other 
commenters either recommended that the Board allow the lead auditor to 
apply judgment in determining what changes should be communicated in 
writing to the other auditor based on the lead auditor's extent of 
supervision of the other auditor, or stated that the requirement could 
cause an other auditor that is not a member of the lead auditor's 
network to be concerned about the confidentiality of its audit 
methodology.
    In its oversight activities, the PCAOB has seen challenges in the 
coordination and communication between lead auditors and other 
auditors, particularly in coordinating their responsibilities for the 
planning and performance of audit procedures. Requiring that certain 
communications be in writing facilitates the supervision of the 
engagement by reducing the risk of miscommunication and lack of clarity 
about responsibilities.
    The terms ``obtain'' and ``in writing'' do not mandate that auditor 
working papers be paper-based.\183\ The Board believes that 
technological advances in communication including those discussed by 
commenters could improve the effectiveness and efficiency of the lead 
auditor's supervision of other auditors, and the Board noted that the 
amendments would not hamper the implementation of novel means of 
communication, including documentation and review.
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    \183\ See AS 1215.04 (audit documentation may be in the form of 
paper, electronic files, or other media).
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    For example, a lead auditor could meet with other auditors through 
video conferencing and could view and discuss documents that are shared 
by video screen. The lead auditor could also obtain documents by (i) 
receiving them via electronic mail or by downloading them via an 
electronic portal and could store them electronically or (ii) accessing 
the other auditor's electronic working papers remotely. In any case, 
audit documentation supporting the lead auditor's conclusions will need 
to contain a record that the lead auditor fulfilled its 
responsibilities under PCAOB standards, including reviewing the 
relevant documents and meeting the requirements of other provisions and 
of other standards regarding matters such as determinations related to 
other auditors' work \184\ and audit documentation.\185\
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    \184\ See, e.g., AS 1201.13 (requiring the lead auditor to make 
certain determinations based on a review of the documentation 
provided by the other auditor, discussions with the other auditor, 
and other information obtained by the lead auditor).
    \185\ See, e.g., AS 1215.06 and AS 1215.18 as amended.
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    As with paper-based documentation of the work of other auditors, 
the necessary level of detail of the other auditors' electronic 
documentation that is required to be requested, obtained, and reviewed 
by the lead auditor and the lead auditor's communication to the other 
auditors under the amendments will depend on the necessary extent of 
supervision of the other auditors' work by the lead auditor.
    Separately, requiring the lead auditor to obtain a written 
description of audit procedures to be performed from the other auditor 
and communicate changes in writing to the other auditor not only allows 
the Board to fulfill its mandates of inspecting and potentially 
investigating the lead auditor's oversight of the other auditor's work 
but it is also important for an audit firm's audit quality reviews such 
as engagement quality reviews and internal inspections. For the reasons 
discussed above, the Board adopted these requirements as proposed.
Obtaining and Reviewing the Other Auditor's Written Affirmation 
Regarding Work Performed
See Paragraph .11 of AS 1201
    As was proposed in the 2021 SRC, under the amendments the lead 
auditor is required to obtain and review a written affirmation as to 
whether the other auditor performed work in accordance with the 
instructions provided, as described in paragraphs AS 1201.08-.10, 
including the other auditor's use of applicable PCAOB standards in 
performing that work. If the other auditor has not performed the work 
in accordance with the instructions provided, the lead auditor is 
required to obtain and review a description of the nature of, and 
explanation of the reasons for, the instances where the work was not 
performed in accordance with the instructions, including (if 
applicable) a description of the alternative work pe

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