(1) On the date fixed by the commission for oral argument upon the appeal of a party, a quorum of the commission shall hear oral argument.

(2) Any member of the commission who is absent at the presentation of oral argument may participate in deliberations and the entry of a final decision or order of the commission if he or she, where required, reviews the complete record of the contested case, including a recording or transcript of the oral argument of the parties.

(3) At the time of oral argument, and subject to the rule of the commission chair, any member of the commission may pose questions to a party, his or her representatives.

(4) At the request of a party or a member of the commission, the date of the hearing may be continued upon a showing of good cause, but not beyond the 120 days provided by law.