In the event that any permittee shall be deemed by the director to have violated any of the provisions of this chapter, or of the regulations promulgated under this chapter, or of the terms of § 21-4.1-6, he or she may, in his or her discretion, initiate proceedings for the revocation of the permit of the permittee. The director shall give the permittee twenty (20) days’ written notice of a hearing at which the permittee shall be given opportunity to show cause as to why his or her permit shall not be revoked. The director may, at the hearing, have the assistance of counsel in ruling upon evidence and in connection with the conduct of the hearing, or, in the alternative, the hearing may be conducted by a subordinate designated by the director for that purpose, who shall take a written record of the proceedings by a competent court stenographer, and the director may decide the issues arising at the hearing upon the basis of the written record. Any decision on the revocation of any permit shall be made by the director in writing by filing his or her written decision containing his or her findings of fact and conclusions in his or her office and serving a copy by registered or certified mail of his or her decision in the matter on the permittee.