1990—Pub. L. 101–647, title XXXVI, §3626(b), Nov. 29, 1990, 104 Stat. 4965, substituted “Clerical assistants, messengers, and private process servers” for “Clerical assistants and messengers” in item 550.
1966—Pub. L. 89–554, §4(c), Sept. 6, 1966, 80 Stat. 617, added chapter 35 and items 541 to 550.