flood mitigation and scour protection. (3) Costs Any costs relating to the conveyance under paragraph (1), including costs of surveys and administrative costs, shall be paid by the Truckee River Flood Management Authority. (4) Reversion If a parcel of Federal land conveyed to the Truckee River Flood Management Authority under paragraph (1) ceases to be used for public recreation or other public purposes consistent with the Act of June 14, 1926 (commonly known as the Recreation and Public Purposes Act ) (44 Stat. 741, chapter 578