FAA Federal Aviation Regulations (FARS, 14 CFR)

(a) General requirements. Each aircraft operator shall use the procedures, facilities and equipment described in its security program to prevent or deter the carriage of unauthorized explosives or incendiaries on board a passenger aircraft in cargo.

(b) Control. Each aircraft operator shall use the procedures in its security program to control cargo that it accepts for transport on an aircraft in a manner that:

(1) Prevents the carriage of any unauthorized explosive or incendiary aboard the aircraft.

(2) Prevents access by persons other than an aircraft operator employee or its agent.

(c) Refusal to transport. Each aircraft operator shall refuse to transport any cargo if the shipper does not consent to a search or inspection of that cargo in accordance with paragraph (a) of this section.