Section 4303 Of Article 3. Registration Of Foreign Vehicles From California Vehicle Code >> Division 3. >> Chapter 1. >> Article 3.

. If in the course of interstate operation of a vehicle registered in another state it is desirable to retain registration in such state, the applicant need not surrender the evidence of foreign registration, but shall deliver it to the department for purposes of inspection, and the department upon a proper showing shall register the vehicle in this State, but shall not issue a certificate of ownership for the vehicle.