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Regulations last checked for updates: May 01, 2025
Title 40 - Protection of Environment last revised: Nov 01, 2025
All Titles
Title 40
Chapter I
Part 87 - PART 87—CONTROL OF AIR POLLUTION FROM AIRCRAFT AND AIRCRAFT ENGINES
View all text of Part 87 [§ 87.1 - § 87.60]
§ 87.31 - Exhaust emission standards for in-use engines.
Exhaust emission standards apply to in-use aircraft engines as described in
40 CFR 1031.60.
authority:
42 U.S.C. 7401
source:
87 FR 72350, Nov. 23, 2022, unless otherwise noted.
cite as:
40 CFR 87.31
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