The conduct of adjudicatory proceedings in accordance with the Uniform Administrative Procedures Act, compiled in title 4, chapter 5, for violations of this part is vested in the commission; provided:
(1) Before censuring any registrant, or suspending or revoking any registration, the commission shall notify the registrant in writing of any charges made at least twenty (20) days before the hearing and shall afford the registrant an opportunity to be heard in person or by counsel; and
(2) Written notice shall be satisfied by personal service on the controlling person of the registrant, or the registrant's agent for service of process in this state, or by sending the notice by certified mail, return receipt requested to the controlling person of the registrant to the registrant's address on file with the commission.