14 C.F.R. § 212.2
For the purposes of this part:
Affinity (pro rata) charter means a charter arranged by an organization on behalf of its membership, and which meets the requirements of § 212.5 .
Certificated air carrier means a U.S. direct air carrier holding a certificate issued under 49 U.S.C. 41102 .
Charter flight means a flight operated under the terms of a charter contract between a direct air carrier and its charterer or lessee. It does not include scheduled interstate air transportation, scheduled foreign air transportation, or nonscheduled cargo foreign air transportation, sold on an individually ticketed or individually waybilled basis.
Charter operator means:
Direct air carrier means a certificated or foreign air carrier that directly engages in the operation of aircraft under a certificate, permit, or exemption issued by the Department.
Fifth freedom charter means a charter flight carrying traffic that originates and terminates in countries other than the carrier's home country, regardless of whether the flight operates via the home country.
Foreign air carrier means a direct air carrier which is not a citizen of the United States as defined in 49 U.S.C. 40102(a) that holds a foreign air carrier permit issued under 49 U.S.C. 41302 or an exemption issued under 49 U.S.C. 40109 authorizing direct foreign air transportation.
Fourth freedom charter means a charter flight carrying traffic that terminates in the carrier's home country having originated in another country.
Gambling junket charter means a charter arranged by a casino, hotel, cruise line, or its agents, the purpose of which is to transport passengers to the casino, hotel, or cruise ship where gambling facilities are available, and which meets the requirements of § 212.6 .
Long-term wet lease means a wet lease which either-
Mixed charter means a charter, the cost of which is borne partly by the charter participants and partly by the charterer, where all the passengers meet the eligibility requirements for "affinity (pro rata)" charters of § 212.5 .
Part charter means flight carrying both charter and scheduled passenger traffic.
Seventh-freedom charter means a charter flight carrying traffic that originates and terminates in a country other than the foreign air carrier's home country, where the flight does not have a prior, intermediate, or subsequent stop in the foreign air carrier's home country.
Single entity charter means a charter the cost of which is borne by the charterer and not by individual passengers, directly or indirectly.
Sixth-freedom charter means a charter flight carrying traffic that originates and terminates in a country other than the country of the foreign air carrier's home country, provided the flight operates via the home country of the foreign air carrier.
Third freedom charter means a charter flight carrying traffic that originates in the carrier's home country and terminates in another country.
Wet lease means a lease between direct air carriers by which the lessor provides all or part of the capacity of an aircraft, and its crew, including operations where the lessor is conducting services under a blocked space or code-sharing arrangement.
14 C.F.R. §212.2