Each person authorized to participate in a contested case as a party or as an intervenor shall file a written notice of appearance with the commissioner. Such appearance may be filed in behalf of parties and intervenors by an attorney, an agent, or other duly authorized representative subject to the rules hereinabove stated. The filing of a written appearance may be excused by the presiding officer.
Conn. Agencies Regs. § 17-210a-23