Cal. Veh. Code § 4309

The department shall forthwith mail a notice of the filing of any application for registration of a vehicle previously registered outside this state upon written request of the governmental officer, agency, or authority which made the last registration of the vehicle outside this state. The notice shall contain like data as required on the application filed with the department. This section shall not apply to applications to register commercial vehicles operating in interstate transportation nor to vehicles last registered in a foreign province or country.