Civil supersonic airplanes: Noise limits.

CFR · 2024-01-01 · US · Title 14

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.

official document · source cfr-2024 · id 14:§ 91.821