A verbatim recording of the fair hearing shall be made. One transcribed copy of the recording shall be supplied to the appellant, at no cost, if the appellant takes a further appeal. The recording, together with all exhibits and papers admitted into evidence, shall constitute the exclusive record for decision. Nonrecorded or confidential information which the appellant does not have an opportunity to hear or see may not be made a part of the hearing record. The written record of the hearing shall be preserved for a period of 3 years and shall be available for examination by the person or his representative at any reasonable time or place during this period. The recording and copies of all exhibits and papers shall remain in the custody of the hearing officer for at least 3 years, or until all litigation involving the decision is terminated.