The administration, protection, and development of the park shall be exercised under the direction of the Secretary of the Interior by the National Park Service, subject to the provisions of the Act of (; ), as amended and supplemented, and the Historic Sites Act of (; ).39 Stat. 53516 U.S.C. 1–4149 Stat. 66616 U.S.C. 461–4671August 25, 19161916-08-25August 21, 19351935-08-21