Section, acts June 17, 1930, ch. 497, title III, § 303,
46 Stat. 687; Jan. 3, 1975,
Pub. L. 93–618, title III, § 331(a),
88 Stat. 2049; Apr. 3, 1979,
Pub. L. 96–6, § 1,
93 Stat. 10; July 26, 1979,
Pub. L. 96–39, title I, §§ 103,
105
(a),
93 Stat. 190, 193, provided for the levy of countervailing duties.