16 U.S.C. § 407a

The administration, protection, and development of said Carlsbad Caverns National 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 August 25, 1916, entitled “An Act to establish a National Park Service, and for other purposes,” 1 See References in Text note below. and Acts supplementary thereto or amendatory thereof.