A prior section 625, act Aug. 14, 1935, ch. 531, title IV, § 425, as added Pub. L. 90–248, title II, § 240(c), Jan. 2, 1968, 81 Stat. 914; amended Pub. L. 96–272, title I, § 103(a), June 17, 1980, 94 Stat. 519; Pub. L. 103–432, title II, § 202(d)(2), Oct. 31, 1994, 108 Stat. 4454; Pub. L. 105–33, title V, § 5592(a)(1)(B), Aug. 5, 1997, 111 Stat. 644, defined terms for purposes of this subchapter, prior to repeal by Pub. L. 109–288, §§ 6(a), 12(a), Sept. 28, 2006, 120 Stat. 1244, 1255, effective Oct. 1, 2006, and applicable to payments under this part and part E of this subchapter for calendar quarters beginning on or after such date.

2022—Pub. L. 117–328 substituted “2023” for “2021”.

2018—Pub. L. 115–123 substituted “2017 through 2021” for “2012 through 2016”.

2011—Pub. L. 112–34 substituted “2012 through 2016” for “2007 through 2011”.

2008—Pub. L. 110–351 inserted “(other than sections 626, 627, and 628b of this title)” after “this subpart”.

Amendment by Pub. L. 112–34 effective Oct. 1, 2011, and applicable to payments under this part and part E of this subchapter for calendar quarters beginning on or after such date, without regard to whether implementing regulations have been promulgated, and with delay permitted if State legislation is required to meet additional requirements, see section 107 of Pub. L. 112–34, set out as a note under section 622 of this title.

Amendment by Pub. L. 110–351 effective Oct. 7, 2008, and applicable to payments under this part and part E of this subchapter for quarters beginning on or after such date, with delay permitted if State legislation is required to meet additional requirements, see section 601 of Pub. L. 110–351, set out as a note under section 671 of this title.

Section effective Oct. 1, 2006, and applicable to payments under this part and part E of this subchapter for calendar quarters beginning on or after such date, without regard to whether implementing regulations have been promulgated, and with delay permitted if State legislation is required to meet additional requirements, see section 12(a), (b) of Pub. L. 109–288, set out as an Effective Date of 2006 Amendment note under section 621 of this title.