Meetings and rules. All meetings of the Zoning Board of Appeals shall be held at the call of the Chairman and at such other times as the Board may determine. All hearings conducted by said Board shall be open to the public. 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 examination and other official actions, all of which shall be immediately filed in the office of the Board and shall be public record. The Zoning Board of Appeals shall adopt its own rules of procedure not in conflict with this Code or with the applicable Wisconsin Statutes.