Rule 4. The person or persons who have been served with a notice of hearing may, at his option, file a written answer thereto prior to the date set for hearing, or at said hearing may appear and present an oral statement on the charges contained in the notice of hearing. When written briefs or arguments are presented, a copy shall be served upon the secretary of state and opposite parties at least 5 days prior to the date set for the hearing.
Mich. Admin. Code R. 11.4