Section, Pub. L. 88–452, title VII, § 733, as added Pub. L. 92–424, § 25(a), Sept. 19, 1972, 86 Stat. 703, provided for evaluation and research and a report to Congress, prior to the general amendment of this subchapter by Pub. L. 93–644, § 10(a), Jan. 4, 1975, 88 Stat. 2315.