(5) The President may by letter addressed to a member revoke the appointment of that member. (6) Where a member of the Board is, for a sufficient reason, unable to act as a member, the Minister shall determine whether the inability would result in the declaration of a vacancy. (7) Where there is a vacancy (a) under subsection (3) or (4) or section 7 (2); (b) as a result of a declaration under subsection (6); or (c) by reason of the death of a member the Minister shall notify the President of the vacancy and the President shall appoint a person to fill the vacancy. Meetings of the Board 6. (1) The Board shall meet at least once every three months for the despatch of business at the times and in the places determined by the chairperson. (2) The chairperson shall at the request in writing of not less than one-third of the membership of the Board convene an extra-ordinary meeting of the Board at the place and time determined by the chairperson. (3) The quorum at a meeting of the Board is seven members of the Board or a greater number determined by the Board in respect of an important matter. (4) The chairperson shall preside at meetings of the Board and in the absence of the chairperson, a member of the Board elected by the members present from among their number shall preside. (5) Matters before the Board shall be decided by a majority of the members present and voting and in the event of an equality of votes, the person presiding shall have a casting vote. (6) The Board may co-opt a person to attend a Board meeting but that person shall not vote on a matter for decision at the meeting. Disclosure of interest 7. (1) A member of the Board who has an interest in a matter for consideration (a) shall disclose the nature of the interest and the disclosure shall form part of the record of the consideration of the matter; and (b) shall not participate in the deliberations of the Board in respect of that matter. (2) A member ceases to be a member of the Board if that member has an interest on a matter before the Board and