Chairman and Vice-Chairman 5. (1) The Society shall elect a Vice-Chairman from amongst its members. The Vice-Chairman shall, subject to subparagraph (2), hold office for the duration of his membership in the Society. (2) The office of the Vice-Chairman shall become vacant: (a) if the holder resigns his office by notice in writing to the Society; or (b) if the holder of the office ceases to be a member of the Society; or (c) if the Society so determines. (3) Whenever the Chairman is absent or is for any reason unable to discharge the functions of his office, the Vice-Chairman shall discharge the functions of the Chairman. Meetings of the Society 6. (1) Subject to subparagraph (2), the Society shall hold ordinary meetings for the dispatch of its business at least four times in each year. (2) An extraordinary meeting of the Society: (a) may be convened by the Chairman at any time; (b) shall be convened by the Chairman within twenty-one days of the receipt by him of a request in writing signed by not less than any three members of the Society and specifying the purpose for which the meeting is to be convened. (3) At any meeting of the Society: (a) the Chairman or, in his absence, the Vice-Chairman, shall preside; (b) in the absence of both the Chairman and the Vice-Chairman the members present and forming the quorum shall elect one of their number to preside; and (c) the quorum shall be formed by any six members. 46