40 C.F.R. § 87.21

Exhaust emission standards for Tier 4 and earlier engines.

Last amended: 2022Year: 2026Length: 16 wordsOfficial source

Cite as 40 C.F.R. § 87.21 (2026)

Exhaust emission standards apply to new aircraft engines as described in 40 CFR 1031.40 through 1031.90.
Cross-references to the CFR
40:1031.40
40 C.F.R. § 87.21: Exhaust emission standards for Tier 4 and earlier engines. | Justis AI