4.—(1) The chairman of the Board or, if the office of chairman is vacant, the deputy chairman of the Board may call an extraordinary general meeting of the Board at any time.
(2) If the offices of chairman and deputy chairman are vacant, the chief officer of the Board may call an extraordinary general meeting of the Board at any time.
(3) Not less than five members of the Board may requisition an extraordinary general meeting of the Board.
(4) The requisition referred to in sub-paragraph (3) shall be in writing and shall be presented to the chairman of the Board or, if the office of chairman is vacant, to the deputy chairman of the Board or, if the offices of chairman and deputy chairman are vacant, to the chief officer of the Board.
(5) Where the chairman, deputy chairman or chief officer (as the case may be) have not called an extraordinary general meeting within seven days of the presentation of a requisition as mentioned in sub-paragraphs (3) and (4), any five members of the Board may forthwith call an extraordinary general meeting of the Board.