(A) The board shall make a sound recording of all record hearings. The board's recording is the official record.
(B) Sound recordings of hearings may be erased after:
(1) A final board order has been issued; and
(2) Ninety calendar days have passed from the mailing of notice of the final order of the board to the parties; or ninety days after a transcript has been received by the board from its official stenographer.
(C) Any party may make a sound recording or have a stenographer present at the hearing, provided such recording does not interfere with the hearing, as determined by the administrative law judge or the board.