§ 21.
Expenses for household and dependent care services necessary for gainful employment
(Added [Pub. L. 94–455, title V, § 504(a)(1)], Oct. 4, 1976, [90 Stat. 1563], § 44A; amended [Pub. L. 95–600, title I, § 121(a)], Nov. 6, 1978, [92 Stat. 2779]; [Pub. L. 97–34, title I] § 124 (a)–(d), Aug. 13, 1981, [95 Stat. 197], 198; [Pub. L. 98–21, title I, § 122(c)(1)], Apr. 20, 1983, [97 Stat. 87]; renumbered § 21 and amended [Pub. L. 98–369, div. A, title IV], §§ 423(c)(4), 471(c), 474(c), July 18, 1984, [98 Stat. 801], 826, 830; [Pub. L. 99–514, title I, § 104(b)(1)], Oct. 22, 1986, [100 Stat. 2104]; [Pub. L. 100–203, title X, § 10101(a)], Dec. 22, 1987, [101 Stat. 1330–384]; [Pub. L. 100–485, title VII, § 703(a)]–(c)(1), Oct. 13, 1988, [102 Stat. 2426], 2427; [Pub. L. 104–188, title I, § 1615(b)], Aug. 20, 1996, [110 Stat. 1853]; [Pub. L. 107–16, title II, § 204(a)], (b), June 7, 2001, [115 Stat. 49]; [Pub. L. 107–147, title IV, § 418(b)], Mar. 9, 2002, [116 Stat. 57]; [Pub. L. 108–311, title II], §§ 203, 207(2), (3), Oct. 4, 2004, [118 Stat. 1175], 1177; [Pub. L. 109–135, title IV, § 404(b)], Dec. 21, 2005, [119 Stat. 2634]; [Pub. L. 110–172, § 11(a)(1)], Dec. 29, 2007, [121 Stat. 2484]; [Pub. L. 117–2, title IX, § 9631(a)], (b), Mar. 11, 2021, [135 Stat. 159].)