Section, Pub. L. 101–337, § 1, July 27, 1990, 104 Stat. 379; Pub. L. 104–333, div. I, title VIII, § 814(h)(1), (2), Nov. 12, 1996, 110 Stat. 4199, defined terms as used in this subchapter. See section 100721 of Title 54, National Park Service and Related Programs.