Cal. VEH § 22511.58

(a) Upon a request to the department by a local public law enforcement agency or local agency responsible for the administration or enforcement of parking regulations, the department shall make available to the requesting agency any information contained in a physician’s certificate submitted to the department as part of the application for a disabled person’s parking privileges, substantiating the disability of a person applying for or who has been issued a parking placard pursuant to Section 22511.55. The department shall not provide the information specified in this subdivision to any private or other third-party parking citation processing agency.

(b) Local authorities may establish a review board or panel, which shall include a qualified physician or medical authority, for purposes of reviewing information contained in the applications for special parking privileges and the certification of qualifying disabilities for persons residing within the jurisdiction of the local authority. Any findings or determinations by a review board or panel under this section indicating that an application or certification is fraudulent or lacks proper certification may be transmitted to the department or other appropriate authorities for further review and investigation.