Amendments
1976—[Pub. L. 94–566, title I, § 115(c)(4)], Oct. 20, 1976, [90 Stat. 2671], substituted “services performed for nonprofit organizations or governmental entities” for “certain services performed for nonprofit organizations and for State hospitals and institutions of higher education” in item 3309.
1970—[Pub. L. 91–373, title I], §§ 104(b)(2), 131(b)(3), Aug. 10, 1970, [84 Stat. 699], 705, added items 3309 and 3310 and redesignated former item 3309 as 3311.
1960—[Pub. L. 86–778, title V, § 531(d)(2)], Sept. 13, 1960, [74 Stat. 984], added item 3308 and redesignated former item 3308 as 3309.
