32 C.F.R. § 1605.56
Each local board shall elect a chairman and vice-chairman at least every two years. A majority of the membership of the board shall constitute a quorum for the transaction of business. A majority of the members present at any meeting at which a quorum is present shall decide any question or classification. Every member present, unless disqualified, shall vote on every question or classification. In case of a tie vote on any question or classification, the board shall postpone action on the question or classification until it can be decided by a majority vote at the next meeting. If the question or classification remains unresolved at the next meeting, the file will be transferred for classification in accord with § 1605.55(c) . If any member is absent so long as to hamper the work of the board, the chairman, a member of the board, or a Selective Service compensated employee shall report that fact to the Director of Selective Service and appropriate action shall be taken. If through death, resignation, or other cause, the membership of a board falls below the prescribed number, it shall continue to function provided a quorum of the prescribed membership is present at each official meeting.
32 C.F.R. §1605.56