620 ILCS 25/28
Where a zoning board of appeals already exists, it may be appointed as the Board of Appeals under this Act. Otherwise, the Board of Appeals shall consist of five members, each to be appointed for a term of three years and until his successor is appointed and qualified, one of whom shall be designated Chairman and one of whom shall be designated Vice-Chairman, which appointments shall be made by the governing body of the political subdivision adopting the regulations, or by the joint airport zoning board adopting the regulations, as the case may be; and said members shall be removable by the appointing body for cause, upon written charges and after notice and opportunity for public hearing before the appointing body.
The vote of a majority of the members of the Board of Appeals shall be sufficient for all purposes, including the reversal of any order, requirement, decision, or determination of the administrative agency, or a decision in favor of the applicant on any matter upon which it is required to pass under the airport zoning regulations, or to effect any variation in such regulations.
The Board shall adopt rules concerning its organization, procedure and other authorized matters, consistent with the provisions of this Act, and in accordance with the provisions of the ordinance or resolution by which it was created. Meetings of the Board 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 vice-chairman, may administer oaths or affirmations and issue subpoenas to compel the attendance of witnesses. All hearings of the Board shall be 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 examinations and other official actions, all of which shall immediately be filed in the office of the Board and shall be a public record.
620 ILCS 25/28