CA Bus & Prof Code Section 4990.33

Notwithstanding any other law, except as provided in Section 4990.32, the expiration, cancellation, forfeiture, or suspension of a license, registration, or other authority to practice by operation of law or by order or decision of the board or a court of law, the placement of a license on a retired status, or the voluntary surrender of a license or registration by a licensee or registrant, of any license or registration within the authority of the board, shall not deprive the board of jurisdiction to commence or proceed with any investigation of, or action or disciplinary proceeding against, the licensee or registrant or to render a decision suspending or revoking the license or registration.