California Code, Government Code - GOV § 53170

(a) Information or documents obtained by a city, county, or other local agency for the purpose of issuing a local identification card shall be used only for the purposes of administering the identification card program or policy. This information, including the name and address of any person who applies for or is issued a local identification card, is exempt from disclosure under the California Public Records Act (Division 10 (commencing with Section 7920.000) of Title 1 of the Government Code), shall not be open to the public for inspection, and shall not be disclosed except as required to administer the program, or as otherwise required by California law, any local law governing the identification card program, or court order. This section does not prohibit the disclosure of aggregate data if it is disclosed in a manner that would prevent it from being used to determine the identities of the persons upon whom the data is based.

(b) The Legislature hereby finds and declares that protecting the privacy of the residents of this state is an important matter of statewide concern. This section shall therefore apply equally to all cities and counties in this state, including charter cities and charter counties.