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.