Cal. Bus. & Prof. Code § 3754.8

The expiration, cancellation, forfeiture, or suspension of a license, practice privilege, or other authority to practice respiratory care 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 the license by a licensee shall not deprive the board of jurisdiction to commence or proceed with any investigation of, or action or disciplinary proceeding against, the licensee, or to render a decision to suspend or revoke the license.