9. If a trustee refuses to accept office, or dies or resigns, or ceases to be qualified or becomes incapable of acting, at the discretion of the trustees the resulting vacancy shall either be left vacant or shall be filled in the manner following:–
(a)the trustees shall fill the vacancy by co-opting as a trustee any person duly qualified in accordance with the provisions of this Order, and the trustee so substituted shall continue in office for the period that the person in whose place the co-opted trustee is appointed would in the ordinary course have continued in office;
(b)at the end of such period the co-opted trustee shall go out of office but shall be eligible for re-election if qualified.