The county board or hearing examiner, as the case may be, shall use the following procedure for all hearings:
(1) Tape-record the hearing;
(2) Make a decision within thirty days following the hearing;
(3) Make the decision based upon the evidence adduced and the law;
(4) Provide the claimant a written copy of the decision setting forth findings and conclusions; and
(5) Preserve the tape of the hearing and all exhibits offered at the hearing for not less than sixty days following entry of the hearing decision.