§ 91.821. Civil supersonic airplanes: Noise limits.
45 words·~1 min read·
/us/cfr/t14/s§ 91.821·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
Except for Concorde airplanes having flight time before January 1, 1980, no person may operate in the United States, a civil supersonic airplane that does not comply with Stage 2 noise limits of part 36 in effect on October 13, 1977, using applicable trade-off provisions.