14 C.F.R. § 294.10
Canadian charter air taxi operators registered under this part are exempt from the following provisions of 49 U.S.C. Subtitle VII to the extent necessary to perform charter air service between the United States and Canada, and as long as they comply with the terms, conditions, and limitations of this part:
[ER-1257, 46 FR 52591, Oct. 27, 1981, as amended at 60 FR 43526, Aug. 22, 1995; 71 FR 49347, Aug. 23, 2006; DOT-OST-2014-0140, 84 FR 15934, Apr. 16, 2019]