Regulation · 14 CFRCurrent as of October 15, 2026 (eCFR)
14 CFR 91.821 Civil supersonic airplanes: Noise limits
Subpart I—Operating Noise Limits
A reference copy of the official regulation text for study. It is not legal advice or an FAA interpretation; always confirm against the current official source.
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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