14 CFR 223.2: Exemption from 49 U.S.C. 41102.

(a) Any all-cargo carrier is exempted from 49 U.S.C. 41102 to the extent necessary to carry, for purposes of in-flight observation, technical representatives of companies that have been engaged in the manufacture, development, or testing of aircraft or aircraft equipment.

(b) Every carrier providing transportation under this section shall also comply with the applicable regulations of the Federal Aviation Administration such as regulations pertaining to admission of persons to the aircraft flight deck.