(1) Board quorum. For the purpose of adopting, amending, or repealing these rules or transacting other administrative business, at least three members of the board shall constitute a quorum of the board. A quorum being present, any action may be taken upon the vote of the majority of the board members.

(2) Panel quorum. For purposes of making orders or decisions in a case, two members of a panel shall constitute a quorum and may act even though one panel member is absent. One member may hold conferences or hearings. The findings of such member shall not become final until approved by a majority of the panel. A panel member who does not attend a hearing may participate in the decision and shall review a transcript or recording of the hearing before signing the decision.