A licensee shall respond within 30 days to a written communication from the Board or its designee and shall make available to the Board any relevant and authorized records with respect to an inquiry or complaint about the licensee's professional conduct. The 30-day period commences on the date the Board sends the communication by registered or certified mail with return receipt requested to the licensee's last known address. It is the responsibility of the licensee to notify the Board, in writing, of any change of his or her mailing address.
249 CMR, § 5.01