40-10-4   MEETING--QUORUM.
   All meetings of the Zoning Board of Appeals shall be held at the call of the Chairman and at such times as the Board may determine. All Board meetings shall be open to the public. The Board may adopt their own rules of meeting procedures consistent with this Code and the applicable Illinois Statutes. The Board may select such officers as it deems necessary. The Chairman, or in his absence, the Acting Chairman may administer oaths and compel the attendance of witnesses. Four (4) members of the Board shall constitute a quorum, and the affirmative vote of at least four (4) members shall be necessary to authorize any Board action. (See Sec. 40-10-6 for vote on decisions of Board.)