Utah Code § 81-15-109
§ 81-15-109. Party participation.
(1) A party may: (a) be represented in an arbitration by an attorney; (b) be accompanied by an individual who will not be called as a witness or act as an advocate; and (c) participate in the arbitration to the full extent permitted under the law and procedural rules of this state, other than this chapter, governing a party's participation in contractual arbitration. (2) A party or representative of a party may not communicate ex parte with the arbitrator except to the extent allowed in a family law proceeding for communication with a judge.