The court shall review the case upon the certified record or transcript of the commission, and no new or additional evidence shall be introduced or oral testimony heard, but the court may, in advance of its judgment, remand the case to the commission for the purpose of taking additional testimony or other proceedings. In the event the court, in advance of its judgment, does not remand the case to the commission for the purpose of taking additional testimony or other proceedings, then the court shall have up to 180 days from the date the case is submitted to the court to render its judgment.
For the purpose of carrying out the provisions of this subdivision 2, the chief justice of the supreme court, with the advice and consent of the supreme court, is hereby authorized to appoint such special masters, accountants, utility rate-making consultants and such other personnel as he deems necessary to aid and assist the court in these appellate procedures. Such personnel may be appointed and employed on a part-time or full-time basis without regard to the merit system.