; (2) the ability of the airport to leverage private sector investments on the airport or develop public-private partnerships to build or improve facilities at the airport; and (3) if the application is submitted by a community, evidence that the airport supports the application. (c) Limitation (1) State limit Not more than 4 airports in the same State may be selected to participate in the program established under subsection (a) in any fiscal year. (2) Dollar amount limit Not more than $500,000 shall be made available for any airport in any fiscal year under the program established under subsection (a). (d) Priorities In selecting airports for participation in the program established under subsection (a), the Secretary shall give priority to airports at which— (1) the operator or sponsor of the airport, or the community in which the airport is located— (A) will provide a portion of the cost of the project for which assistance is sought under the program from local sources; (B) will employ best business practices in developing or implementing a public-private partnership; or (C) has established, or will establish, a public-private partnership to build or improve facilities at the airport; or (2) the assistance will be used in a timely fashion. (e) Types of assistance The Secretary may use amounts made available under this section— (1) to provide assistance to market an airport to private entities or individuals in order to leverage private sector investments or develop public-private partnerships for the purposes of building or improving hangars, businesses, or other facilities at the airport; (2) to fund studies that consider what measures an airport should take to attract private sector investment at the airport