Except as otherwise provided in §§B and C of this regulation, all contested case hearings before the Board shall be governed by COMAR 09.01.02. The administrative unit shall send the hearing notice described in COMAR 09.01.02.07B: At least 30 days before the hearing; or If the parties have agreed to a date for which 30 days notice cannot be given, at the earliest time possible. During the hearing, the presiding officer may recognize members of the Board or counsel to the Board to ask questions of witnesses or of counsel. The Board may call witnesses of its own or recall witnesses to elicit facts or opinions.