§ 6521.
([Pub. L. 101–624, title XXI, § 2122], Nov. 28, 1990, [104 Stat. 3951]; [Pub. L. 110–234, title VII, § 7511(c)(24)], May 22, 2008, [122 Stat. 1269]; [Pub. L. 110–246, § 4(a)], title VII, § 7511(c)(24), June 18, 2008, [122 Stat. 1664], 2031; [Pub. L. 115–334, title X, § 10104(h)], Dec. 20, 2018, [132 Stat. 4901].)