(1) All meetings of the board, other than contested case hearings, shall be conducted by the presiding officer. In the absence of the presiding officer, the vice-presiding officer shall exercise the presiding officer's powers.

(2) The presiding officer may call any meeting of the board to order, pursuant to notice, when he or she determines that a quorum is present. A quorum is at least four members present, physically or by teleconference media.

(3) The presiding officer may impose time limits on the oral presentation of any person appearing before the board at any meeting other than a contested case hearing.

(4) The presiding officer may appoint a hearing examiner to conduct a contested case hearing within the agenda of a board meeting. A member of the board, including the presiding officer, may question a witness through and by leave of a hearing examiner so appointed.