(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.