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.
A motor private carrier or a motor carrier of migrant workers may use an identification plate only as authorized by the Secretary.
(Pub. L. 97–449, Jan. 12, 1983, 96 Stat. 2439, § 3104; renumbered § 31504 and amended Pub. L. 103–272, § 1(c), (e), July 5, 1994, 108 Stat. 745, 1030.)