Section 4020 Of Article 5. Fines And Penalties From California Public Utilities Code >> Division 2. >> Chapter 2.5. >> Article 5.

. The commission shall periodically, but not less frequently than quarterly, transmit to the department a list of persons, firms, and corporations which have received a carrier identification number from the department, but which have not registered with the commission. The department may use this list in its normal enforcement activities, including terminal inspections and roadside enforcement, as prima facie evidence of a failure to register.