40 CFR § 87.31Chapter I
§ 87.31 Exhaust emission standards for in-use engines.
Primary source
Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.
Full Text
Exhaust emission standards apply to in-use aircraft engines as described in 40 CFR 1031.60.
eCFR data current as of: June 10, 2026
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