Section,
Pub. L. 92–513, title III, § 311, as added
Pub. L. 93–492, title III, § 301(a)(4) Oct. 27, 1974,
88 Stat. 1485; amended
Pub. L. 94–364, title III, § 302, July 14, 1976,
90 Stat. 982, directed Secretary to establish special motor vehicle diagnostic inspection demonstration project.