Cal. FGC § 309

(a) The commission or any person appointed by it to conduct a hearing may, in any investigation or hearing, cause the deposition of witnesses, residing within or without the state, to be taken in the manner prescribed by law for deposition in civil actions in the superior courts of this state under Title 4 (commencing with Section 2016.010) of Part 4 of the Code of Civil Procedure, and may compel the attendance of witnesses and the production of documents and papers. The commission shall adopt regulations that afford procedural and substantive due process to any person whose license or permit is subject to revocation or suspension. Except upon conviction of a violation of this code or a regulation adopted pursuant to this code relating to the licensed or permitted activity and notwithstanding any other provision of this code, the commission shall not revoke or suspend any license or permit until the regulations required by this section have been adopted and approved by the Office of Administrative Law pursuant to Chapter 3.5 (commencing with Section 11340) of Part 1 of Division 3 of Title 2 of the Government Code.

(b) Any deliberation conducted by the commission, or conducted by any person appointed by the commission to conduct hearings, is deemed to be a proceeding required to be conducted pursuant to Chapter 5 (commencing with Section 11500) of Part 1 of Division 3 of Title 2 of the Government Code or similar provision, within the meaning of paragraph (3) of subdivision (c) of Section 11126 of the Government Code.