49 U.S.C. § 47508 — Noise standards for air carriers and foreign air carriers providing foreign air transportation

(a) Requirements. The Secretary must require each air carrier and foreign air carrier providing foreign air transportation to comply either with the Secretary’s standards for new subsonic aircraft in regulations effective January 1, 1977, or with International Civil Aviation Organization standards substantially compatible with the Secretary’s standards in 14 C.F.R. parts 36 and 91 prescribed between January 2, 1977, and January 1, 1982. (b) Phased compliance. The Secretary must require compliance at a phased rate similar to the rate for aircraft registered in the United States. (c) No discrimination. The requirement for air carriers providing foreign air transportation may not be stricter than the requirement for foreign air carriers.