Section 
1391, 
Pub. L. 89–563, title I, § 102, Sept. 9, 1966, 
80 Stat. 718; 
Pub. L. 91–265, § 2, May 22, 1970, 
84 Stat. 262; 
Pub. L. 93–492, title I, § 110(a), title II, § 201, Oct. 27, 1974, 
88 Stat. 1484, provided definitions for purposes of this subchapter. See sections 
30102, 
30111, and 
30125 of Title 
49, Transportation.
 
Section 
1392, 
Pub. L. 89–563, title I, § 103, Sept. 9, 1966, 
80 Stat. 719; 
Pub. L. 89–670, Oct. 15, 1966, 
80 Stat. 931; 
Pub. L. 93–492, title II, § 202, Oct. 27, 1974, 
88 Stat. 1484; 
Pub. L. 94–346, §§ 2, 
3, July 8, 1976, 
90 Stat. 815; 
Pub. L. 97–331, § 3, Oct. 15, 1982, 
96 Stat. 1619; 
Pub. L. 102–240, title II, § 2505, Dec. 18, 1991, 
105 Stat. 2084, related to motor vehicle safety standards. See sections 
30103, 
30111, and 
30125 of Title 
49.