The BZA shall choose its Chairman and Vice Chairman annually and shall adopt such rules and regulations, consistent with this chapter, necessary to govern the conduct of its business. Meetings of the BZA, held at the call of the Chairman or at such times as the BZA itself shall determine, shall be open to the public. The BZA's minutes shall be available for public inspection in the BZA's office during normal business hours and shall show the vote of each member on all questions considered. The BZA may hold a work or study session, but no official action shall be taken at such meetings. Three members present at a meeting shall constitute a quorum and all decisions shall be by majority vote, except that the favorable vote of at least three members shall be required to approve any variance permit or reverse any prior decision of the BZA or any order, requirement, decision or determination of the administrator. The BZA shall render an annual report of its activities to the governing body as of the close of each calendar year.