(a) General. A party may be represented by legal counsel or by any other person appointed to act as its representative at any proceeding before the MGCRB or the Administrator.

(b) Rights of a representative. A representative appointed by a party may accept or give on behalf of the party any request or notice connected with any proceeding before the MGCRB or the Administrator. A representative is entitled to present evidence and argument as to facts and law in any MGCRB proceeding affecting the party represented and to obtain information to the same extent as the party represented. Notice of any action or decision sent to the representative of a party has the same effect as if it had been sent to the party itself.