Section, acts Aug. 13, 1946, ch. 957, title VIII, § 811,
60 Stat. 1020; Aug. 5, 1955, ch. 576, § 10,
69 Stat. 537; Sept. 8, 1960,
Pub. L. 86–723, § 33,
74 Stat. 839; Feb. 28, 1970,
Pub. L. 91–201, title I, § 102(a),
84 Stat. 17; July 12, 1976,
Pub. L. 94–350, title V, § 504,
90 Stat. 836; Aug. 17, 1977,
Pub. L. 95–105, title IV, § 409(a),
91 Stat. 854, Ex. Ord. No. 12145, § 1–103, July 18, 1979,
44 F.R.
42653, related to rate of contributions to Fund.