(a) Contested case proceedings shall be recorded by:
(1) mechanical or electrical means; or
(2) a certified shorthand reporter.
(b) At the request of a party, the proceedings or any part of the proceedings shall be transcribed. The expense of the transcription shall be charged to the requesting party.
(c) The recording, stenographic notes, or transcription of oral proceedings shall be maintained by the board until at least the fifth anniversary of the date of the decision in the contested case.