14 CFR § 156.4 - Airport and project eligibility.
(a) A participating State shall use monies distributed pursuant to a State block grant agreement for airport development and airport planning, for airport noise compatibility planning, or to carry out airport noise compatibility programs, in accordance with the Airport and Airway Improvement Act of 1982, as amended.
(c) A participating State shall not use any monies distributed pursuant to a State block grant agreement for integrated airport system planning, projects related to any primary airport, or any airports -
(1) Outside the State's boundaries; or
(2) Inside the State's boundaries that are not included in the National Plan of Integrated Airport Systems.