Cal. Bus. & Prof. Code § 6085
Any person complained against shall be given fair, adequate, and reasonable notice and have a fair, adequate, and reasonable opportunity and right:
(e) To exercise any right guaranteed by the California Constitution or the United States Constitution, including the right against self-incrimination.
He or she shall also have the right to the issuance of subpoenas for attendance of witnesses to appear and testify or produce books and papers, as provided in this chapter.