(2) Upon request of any party in a major proceeding before the commission, the commission shall afford the parties an opportunity for oral argument before a final order is issued. There must be a quorum of the commission present at the time the oral argument is made. The commission shall adopt rules that establish criteria for determining which proceedings give rise to a right to oral argument under this subsection. In addition, the commission may adopt rules governing participation in oral arguments, cross-examination of witnesses, draft or proposed orders or such other matters as the commission deems appropriate. [Formerly 756.510; 2001 c.558 §3]