Cal. Gov't Code § 7927.105
(a) As used in this section, the term “patron use records” includes both of the following:
(b) This section does not apply to either of the following:
(c) All patron use records of a library that is in whole or in part supported by public funds shall remain confidential. A public agency, or a private actor that maintains or stores patron use records on behalf of a public agency, shall not disclose those records to any person, local agency, or state agency, except as follows: