The Secretary may consult and enter into cooperative agreements with interested entities and individuals to provide for the preservation, development, interpretation, and use of the park.

Any payment made by the Secretary pursuant to a cooperative agreement under this paragraph shall be subject to an agreement that conversion, use, or disposal of the project so assisted for purposes contrary to the purposes of this subchapter, as determined by the Secretary, shall result in a right of the United States to reimbursement of all funds made available to such a project or the proportion of the increased value of the project attributable to such funds as determined at the time of such conversion, use, or disposal, whichever is greater.