2002—Pub. L. 107–347, title I, §102(c)(2), Dec. 17, 2002, 116 Stat. 2910, added item 507.
1990—Pub. L. 101–576, title II, §203(c), Nov. 15, 1990, 104 Stat. 2841, added items 503 and 504 and redesignated former items 503 and 504 as 505 and 506, respectively.
1983—Pub. L. 97–452, §1(1)(B), Jan. 12, 1983, 96 Stat. 2467, added item 504.