§ 31504. Identification of motor vehicles

• (a) 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) A motor private carrier or a motor carrier of migrant workers may use an identification plate only as authorized by the Secretary.