14 CFR 252.3 : Aeronautics And Space (§ 1.1 To Parts 1311-1399) — (§ 200.1 To Parts 461-1199) — Office Of The Secretary, Department Of Transportation (Aviation Proceedings) (§ 200.1 To § 399.120) — Economic Regulations (§ 200.1 To § 298.80) — Smoking Aboard Aircraft (§ 252.1 To § 252.17) — Definitions.

As used in this part:

Air carrier means a carrier that is a citizen of the United States undertaking to provide air transportation as defined in 49 U.S.C. 40102.

Foreign air carrier means a carrier that is not a citizen of the United States undertaking to provide foreign air transportation as defined in 49 U.S.C. 40102.

Smoking means the use of a tobacco product, electronic cigarettes whether or not they are a tobacco product, or similar products that produce a smoke, mist, vapor, or aerosol, with the exception of products (other than electronic cigarettes) which meet the definition of a medical device in section 201(h) of the Federal Food, Drug and Cosmetic Act, such as nebulizers.