49 CFR § 523.4
Passenger automobile
November 18, 2020
A passenger automobile is any automobile (other than an automobile capable of off-highway operation) manufactured primarily for use in the transportation of not more than 10 individuals.
(Sec. 301, Pub. L. 94-163, 80 Stat. 901 (15 U.S.C. 2001))
[42 FR 38362, July 28, 1977]