Section R. 209.9 - RepresentationRule 9.
(1) Practice before the commission, except in a matter involving state equalization, shall be by the interested party or the party's personal representative upon presentation of adequate identification evidenced by written authorization.(2) In a formal hearing, an individual may represent himself or herself and a partnership or corporation may be represented by a partner or officer. In any case, the individual, partnership, or corporation may be represented by an attorney or other authorized representative.Mich. Admin. Code R. 209.9