1. Regulations
  2. title 40
  3. chapter I-i21
  4. part 87
  5. § 87.21

View all text of Part 87 [§ 87.1 - § 87.60]

§ 87.21 - Exhaust emission standards for Tier 4 and earlier engines.

Exhaust emission standards apply to new aircraft engines as described in 40 CFR 1031.40 through 1031.90.

AUTHORITY: 42 U.S.C. 7401

SOURCE: 87 FR 72350, Nov. 23, 2022, unless otherwise noted.

CITE AS: 40 CFR 87.21