Unless otherwise provided by law, the commission may by rule provide that oral proceedings before the commission may be taken by any means that provides a full and complete record, including tape recording or stenography. The commission by rule shall determine when tape recordings are transcribed. A party to the proceeding may request a copy of a tape recording or a written transcript if one is provided. The commission may charge a reasonable fee for a copy of a proceeding. Copy costs shall be determined by the commission by rule and money collected shall be deposited in the general fund.