FAR 135.7: What Constitutes Charter?
Subpart A – General 119.1 Applicability. (a) This part applies to each person operating or intending to operate civil aircraft- (1) As an air carrier or commercial operator, or both, inair commerce or (2) When common carriage is not involved, in operations ofU.S.-registered civil airplanes with a seat configuration of 20 or more passengers, or […]