Amendments
2004—Pub. L. 108–454, title V, §§ 503(b), 504(b)(2), , 118 Stat. 3620, 3621, added items 6106 to 6108.
1991—Pub. L. 102–40, title IV, § 402(c)(1), , 105 Stat. 239, renumbered items 3501 to 3505 as 6101 to 6105, respectively.
1959—Pub. L. 86–222, § 3(b), , 73 Stat. 453, added item 3505.