16 U.S.C. § 18j
Section, Pub. L. 91-357, §4, July 29, 1970, 84 Stat. 472; Pub. L. 94-128, Nov. 13, 1975, 89 Stat. 682; Pub. L. 98-540, §1(a), Oct. 24, 1984, 98 Stat. 2718; Pub. L. 104-333, div. I, title VIII, §805, Nov. 12, 1996, 110 Stat. 4188; Pub. L. 113-235, div. F, title I, §118, Dec. 16, 2014, 128 Stat. 2421, authorized appropriations. See section 102301(d) of Title 54, National Park Service and Related Programs.