Iowa Admin. Code r. 11-7.20
7.20(1) The appointed presiding officer in a contested case proceeding shall preside at the hearing and may:
7.20(3) Parties in a contested case have the right to participate or to be represented in all hearings or prehearing conferences related to their case. Partnerships, corporations or associations may be represented by any member, officer, director or duly authorized agent.
Any party may be represented by an attorney or another person authorized by law. The cost of representation is the responsibility of the party.
7.20(7) The presiding officer shall conduct the hearing in the following manner: