All meetings of the zoning board of appeals shall be held at the call of the chair and at such times as such board may determine. All hearings conducted by the 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 hearings and other official actions. Findings of fact shall be included in the minutes of each case of a requested variation, and the reasons for recommending or denying such variation shall be specified. Every rule or regulation, every amendment or repeal thereof and every order, requirement, decision or determination of the board shall be filed immediately in the office of the board and shall be a public record. The board shall adopt its own rules of procedure not in conflict with this chapter or with the Illinois statutes in such case made and provided. The board may select or appoint such officers as it deems necessary. (1982 Code § 2-3-2)