; and (iv) the Administrator of the National Aeronautics and Space Administration. (3) Considerations In awarding grants to sponsors under the pilot program under this section, the Secretary shall consider the following with respect to projects funded under the grant: (A) Whether the project is natural infrastructure or nature-based. (B) Whether the project is based on the best available science and engineering standards. (C) Whether the project will mitigate the airport’s impact on the environment. (D) Other items determined appropriate by the Secretary. (4) Eligibility To be eligible to receive a grant under the pilot program under this section, a sponsor of an airport shall submit an application to the Secretary at such time, in such form, and containing such information as the Secretary may require. Such information shall include a description of how the proposed project is projected to benefit and potentially impact both the airport and the surrounding communities regarding changing conditions, weather events, and natural disasters. (5) Reports to Secretary A sponsor of an airport that is awarded a grant under the pilot program under this section shall submit to the Secretary periodic reports on the use of the funds. Such reports shall be submitted at such time, in such form, and containing such information as the Secretary may require. (b) Distribution for regional airports In conducting the pilot program under this section, the Secretary shall ensure that not less than 15 percent of the funds made available under subsection (e) is used to award grants to sponsors of regional airports. (c) Federal share The United States Government's share of allowable project costs for a project carried out with a grant under the pilot program shall be the United States Government's share of allowable project costs specified under section 47109 of title 49, United States Code. (d) Requirements The construction work for a project funded with grant under the pilot program shall be subject to the requirements under section