16 USC 272 - Establishment of park

(a) In general 

(1) Initial boundaries 
Subject to valid existing rights, the lands, waters, and interests therein within the boundary generally depicted on the map entitled Boundary Map, Proposed Arches National Park, Utah, numbered RPSSC13820, 001E and dated September 1969, are hereby established as the Arches National Park (hereinafter referred to as the park).
(2) Expanded boundaries 
Effective on October 30, 1998, the boundary of the park shall include the area consisting of approximately 3,140 acres and known as the Lost Spring Canyon Addition, as depicted on the map entitled Boundary Map, Arches National Park, Lost Spring Canyon Addition, numbered 138/60,000B, and dated April 1997.
(3) Maps 
The maps described in paragraphs (1) and (2) shall be on file and available for public inspection in the offices of the National Park Service, Department of the Interior.
(b) Abolition of Arches National Monument; funds of monument available for park; administration of lands excluded from monument 
The Arches National Monument is hereby abolished, and any funds available for purposes of the monument shall be available for purposes of the park. Federal lands, waters, and interests therein excluded from the monument by this subchapter shall be administered by the Secretary of the Interior (hereinafter referred to as the Secretary) in accordance with the laws applicable to the public lands of the United States.