The Building and Zoning Appeals Board shall adopt rules necessary to the conduct of its affairs in keeping with the provisions of this Part. Meetings shall be held at the call of the chairman and at such other times as the Board may determine. The chairman, or in his absence the acting chairman, may administer oaths and compel the attendance of witnesses. The Board shall keep minutes of its proceedings, showing the vote of each member upon each question, or if absent or failing to vote, indicating such fact, and shall keep records of its examinations and other official actions, all of which shall be public record and be immediately filed in the office of the Board.