§ 31504. Identification of motor vehicles
(a)
General Authority.—
The Secretary of Transportation may—
(1)
issue and require the display of an identification plate on a motor vehicle used in transportation provided by a motor private carrier and a motor carrier of migrant workers subject to section
31502
(c) of this title, except a motor contract carrier; and
(2)
require each of those motor private carriers and motor carriers of migrant workers to pay the reasonable cost of the plate.
(b)
Limitation.—
A motor private carrier or a motor carrier of migrant workers may use an identification plate only as authorized by the Secretary.