No disciplinary action relating to the license, registration, certificate, or permit of any person or entity regulated by the board may be taken unless a statement of charges and notice of hearing has been served on the person or entity at least 30 days before the date fixed for the hearing. The board, at its sole discretion, may serve the statement of charges by personal service or by registered or certified mail or delivery by any recognized delivery or courier service to the address of the person or entity in the records of the board. The burden of proof shall be on the board.