Airport means any public-use airport, including heliports, as defined in 49 U.S.C. 47102, including:
(1) A public airport; or
(2) A privately-owned airport used or intended to be used for public purposes that is -
(i) A reliever airport; or
(ii) Determined by the Secretary to have at least 2,500 passenger boardings each year and to receive scheduled passenger aircraft service.
14 CFR § 153.3
The following definitions apply in this subpart: