In par. (4), “section 100501 of title 54” substituted for “section 2(a) of the Act entitled ‘An Act to facilitate the management of the National Park System and miscellaneous areas administered in connection with that system, and for other purposes’, approved August 8, 1953 (16 U.S.C. 1c(a))” on authority of Pub. L. 113–287, § 6(e), Dec. 19, 2014, 128 Stat. 3272, which Act enacted Title 54, National Park Service and Related Programs.