(a) Parties to a hearing may petition a board to obtain discovery regarding any matter, not privileged, which is relevant to the subject matter involved in the pending hearing, subject to the procedural rules of the boards and the limitations contained herein.
(b) The following limited discovery may be commenced and obtained by any party to the hearing without leave of a board:
(1) Requests for disclosure of the identity of each person expected to be called as a witness at the hearing and, at a minimum, a statement setting forth with specificity the facts alleged, the anticipated testimony and the identity of any documents relied upon in support of the anticipated testimony of each witness and whether that witness will be called as an expert; and