The record in a contested case shall include: (1) written notices related to the case; (2) all petitions, pleadings, motions and intermediate rulings; (3) evidence received or considered; (4) questions and offers of proof, objections and rulings thereon; (5) the official transcript, if any, of proceedings relating to the case, or, if not transcribed, any recording or stenographic record of the proceedings; (6) proposed final decisions and exceptions thereto; and (7) the final decision. The commission or presiding officer may designate other documents or portions of the commission's proceedings as part of the record in a contested case. Requests to so designate other material as part of the record shall be made to the commission or presiding officer at the time the final decision is adopted.