(a) Scheduled Airline. This term means any individual, partnership, corporation, or association engaged in air transportation upon regular schedules to, over, or away from the United States, or from one place to another in the United States, and holding a Foreign Air Carrier permit or a Certificate of Public Convenience and Necessity issued pursuant to the Federal Aviation Act of 1958 (72 Stat. 731).

(b) International Airport. An international airport is one designated by the Commissioner for the entry of aliens with the prior approval of the Secretary of Commerce, Secretary of the Treasury and the Secretary of Health and Human Services.

(c) Landing Rights Airport. An airport, although not designated as international, at which permission to land has been granted to aircraft operated by scheduled airlines by the Commissioner of Customs.