8(1)The Secretary of State shall appoint one of the members of an authority, other than their chief executive, to be their chairman and, after consulting the chairman, may appoint any one of the members to be deputy chairman; and a chairman, or as the case may be deputy chairman, shall hold and vacate the office in question in accordance with the terms of the instrument under which he is appointed to that office.
(2)A member of the authority may resign as chairman or deputy chairman by written notice to the Secretary of State; but a chairman or deputy chairman who ceases to be a member of the authority (whether or not on giving notice under paragraph 6(b) above) ceases to be their chairman or deputy chairman.
(3)Where a member of an authority becomes, or ceases to be, the chairman or deputy chairman of the authority, the Secretary of State may vary the terms of the instrument under which he is appointed a member so as to alter the date on which office as a member is to be vacated.