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14 CFR · PART 121
§ 121.555 Compliance with approved routes and limitations: Domestic and flag operations.
Official text · Current as of Oct 19, 2026 · from eCFR
No pilot may operate an airplane in scheduled air transportation—
(a) Over any route or route segment unless it is specified in the certificate holder's operations specifications; or
(b) Other than in accordance with the limitations in the operations specifications.
[Docket 6258, 29 FR 19219, Dec. 31, 1964, as amended by Amdt. 121-253, 61 FR 2614, Jan. 26, 1996]
Not legal advice. This is the official text as published in the eCFR, which is updated daily but is not the legal edition.
For legal purposes, use the annual Code of Federal Regulations or ask an aviation attorney.