Public Utilities Code
Common Carriers
1068. No common carrier shall operate any motor vehicle over any public highway unless there is displayed on the vehicle a distinctive identifying symbol in the form prescribed by the commission, showing the classification to which the carrier belongs.
No such identifying symbol shall be displayed on any vehicle until a certificate of public convenience and necessity has been issued to the carrier. The identifying symbols displayed by carriers subject to the Interstate Commerce Commission Order Ex Parte No. MC-41, Identification of Motor Carrier Vehicles, November 17, 1954, effective January 3, 1955, shall serve in lieu of the display requirements of this section, if the identifying symbols have been recorded by the carrier with the commission.
The identifying symbol shall be displayed on both the left and right doors of the cab of the vehicle.