§ 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.
Daily eCFR
§ 87.31 Exhaust emission standards for in-use engines.
40 CFR 87.31
40 CFR 87.31
Exhaust emission standards apply to in-use aircraft engines as described in 40 CFR 1031.60.