Cal. Veh. Code § 40200.8

The parking processing agency shall notify the department and recall any hold on the registration of a vehicle that it filed with the department in connection with a parking citation if the processing agency is awarded a civil judgment for the citation pursuant to subdivision (b) or (c) of Section 40220, or if the processing agency has granted a review of the issuance of the citation pursuant to Section 40200.7 or Section 40215.