For the purpose of this subchapter—
(Added Pub. L. 95–454, title IV, § 411(2), Oct. 13, 1978, 92 Stat. 1174; amended Pub. L. 114–92, div. A, title XI, § 1105(c)(5), Nov. 25, 2015, 129 Stat. 1024; Pub. L. 117–81, div. A, title XI, § 1106(b)(2)(E), Dec. 27, 2021, 135 Stat. 1950.)