In order to provide for the preservation, restoration, and interpretation of the Spanish Missions of San Antonio, Texas, for the benefit and enjoyment of present and future generations of Americans, there is hereby established the San Antonio Missions National Historical Park (hereafter in this section referred to as the “park”) consisting of Concepcion, San Jose, San Juan, and Espada Missions, together with areas and features historically associated therewith, as generally depicted on the drawing entitled “Boundary Map, San Antonio Missions National Historical Park”, numbered 930–80,022–C and dated May 1978, which shall be on file and available for public inspection in the offices of the National Park Service, Department of the Interior, and in the offices of the Superintendent of the park.
The park shall also consist of the lands and interests therein within the area bounded by the line depicted as “Proposed Boundary Extension” on the maps entitled “San Antonio Missions National Historical Park”, numbered 472–80,075, 472–80,076, 472–80,077, 472–80,078, 472–80,079, 472–80,080, and 472–80,081 and dated June 7, 1990, which shall be on file and available for public inspection in the same manner as is such drawing.
The boundary of the park is modified to include approximately 137 acres, as depicted on the map entitled “San Antonio Missions National Historical Park Proposed Boundary Addition”, numbered 472/113,006A, and dated June 2012.
The map described in subparagraph (A) shall be on file and available for inspection in the appropriate offices of the National Park Service.
After advising the Committee on Energy and Natural Resources of the United States Senate and the Committee on Natural Resources of the United States House of Representatives, in writing, the Secretary of the Interior (hereinafter referred to as the “Secretary”) may make minor revisions of the boundaries of the park when necessary by publication of a revised drawing or other boundary description in the Federal Register.
The Secretary is authorized and directed to take prompt and appropriate action in accordance with the provisions of this section and any cooperative agreement hereunder to assure the protection and preservation of the historical and architectural values of the missions and the areas and features historically associated therewith within the boundaries of the park. The park shall be administered by the Secretary in accordance with this section and provisions of law generally applicable to units of the National Park System, including the Act of August 25, 1916 (39 Stat. 535; 16 U.S.C. 1 et seq.)  and the Act of August 21, 1935 (49 Stat. 666; 16 U.S.C. 461–467).