Cal. Government Code § 8545.4

(a) In connection with any audit or investigation conducted by the California State Auditor, the California State Auditor, or his or her designee, may do any of the following: (1) Administer oaths. (2) Certify to all official acts. (3) Issue subpoenas for the attendance of witnesses and the production of papers, books, accounts, or documents, or for the making of oral or written sworn statements, in any interview conducted as part of an audit or investigation. (b) Any subpoena issued under this section extends as process to all parts of the state and may be served by any person authorized to serve process of courts of record or by any person designated for that purpose by the California State Auditor or his or her designee. The person serving this process may receive compensation as allowed by the California State Auditor or his or her designee, not to exceed the fees prescribed by law for similar service. (c) Notwithstanding Section 7470, 7474, or 7491, subpoenas issued under this section for financial records of financial institutions concerning customers of financial institutions or for information contained in those records shall not be subject to the requirement or conditions of Section 7474.