; (2) to fund studies that consider what measures an airport should take to attract private sector investment at the airport; or (3) to participate in a partnership described in paragraph (1) or an investment described in paragraph (2). (f) Authority To make agreements The Secretary may enter into agreements with airports and entities entering into partnerships with airports under this section to provide assistance under this section. (g) Availability of amounts from Airport and Airway Trust Fund (1) In general There is authorized to be appropriated, out of the Airport and Airway Trust Fund established under section 9502 of the Internal Revenue Code of 1986, $5,000,000 for each of the fiscal years 2018 through 2022 to carry out this section. (2) Availability Amounts appropriated pursuant to paragraph (1)— (A) shall remain available until expended; and (B) shall be in addition to any amounts made available pursuant to section 48103. . (b) Clerical amendment The analysis for chapter 481 of such title is amended by adding at the end the following: 48115. General aviation public-private partnership program. . (c) Expenditure authority from Airport and Airway Trust Fund Section 9502(d)(1)(A) of the Internal Revenue Code of 1986 is amended by inserting or the FLIGHT Act of 2017 before the semicolon at the end. 5. Disaster relief airports (a) Designation of disaster relief airports Subchapter I of chapter 471 of title 49, United States Code, is amended by adding at the end the following: 47145. Disaster relief airports (a) Designation (1) In general The Secretary of Transportation shall designate as a disaster relief airport an airport that— (A) is categorized as a regional reliever airport in the report issued by the Federal Aviation Administration entitled National Plan of Integrated Airport Systems (NPIAS) 2017–2021 ; (B) is within a reasonable distance, as determined by the Secretary, of a hospital or transplant or trauma center