14 CFR 91.821 — Civil supersonic airplanes: Noise limits.

eCFR 2026-07-09 public domain
Official text: ecfr.gov →

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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.

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