16 U.S.C. § 5953
Section, Pub. L. 105-391, title IV, §404, Nov. 13, 1998, 112 Stat. 3508; Pub. L. 106-176, title III, §311, Mar. 10, 2000, 114 Stat. 34, related to term of concessions contracts. See section 101914 of Title 54, National Park Service and Related Programs.