Public Law 92-207
To establish the Capitol Reef National Park in the State of Utah.
Be it enacted by the Senate and House of Representatives of the United States of America in Congress assembled, That (a) subject to valid existing rights, the lands, waters, and interests therein within the boundary generally depicted on the map entitled "Boundary Map, Proposed Capitol Reef National Park, Utah," numbered 158-91, 002, and dated January 1971, are hereby established as the Capitol Reef National Park (hereinafter referred to as the "park"). Such map shall be on file and available for public inspection in the offices of the National Park Service, Department of the Interior.
Full text of the enabling legislation may be viewed here.