The board shall annually elect from its membership a chair and such other officers as it deems necessary, who shall serve one-year terms. For the conduct of any hearing and the taking of any action, a quorum shall be not less than three (3) members of the five (5) member board. The board may make, alter and rescind rules and forms for its procedures, consistent with ordinances of the county and general laws of the commonwealth, including chapter 13, title 28.2, Code of Virginia. The board shall keep a full public record of its proceedings and shall submit a report of its activities to the board of supervisors at least once each year, and a copy of its report to the commission.