The following persons may be carried aboard an airplane without complying with the passenger-carrying requirements of this part:
(a) A crewmember.
(b) A person necessary for the safe handling of animals on the airplane.
(c) A person necessary for the safe handling of hazardous materials (as defined in subchapter C of title 49 CFR).
(d) A person performing duty as a security or honor guard accompanying a shipment made by or under the authority of the U.S. Government.
(e) A military courier or a military route supervisor carried by a military cargo contract operator if that carriage is specifically authorized by the appropriate military service.
(f) An authorized representative of the Administrator conducting an en route inspection.
(g) A person authorized by the Administrator.