(C) if the number of Forum councillors exceeds 15, 5 Forum councillors, present at the meeting of Forum councillors. (c) If there is a vacancy in the office of a Forum councillor then, subject to rule 14.9(d), the remaining Forum councillors may act. (d) If the number of Forum councillors in office at any time is not sufficient to constitute a quorum at a meeting of Forum councillors, or is less than the minimum number of Forum councillors fixed under this constitution, the remaining Forum councillors must act as soon as possible to: (1) encourage those members of the Forum who have not appointed a Forum councillor to do so; or (2) convene a General Assembly meeting of the Forum for that purpose, and, until that has happened, may only act if and to the extent that there is an emergency requiring them to act. 14.10 Chairperson of Forum councillors (a) The Forum councillors may elect a Forum councillor as chairperson of Forum councillors and may decide the period for which that person is to be the chairperson. (b) The chairperson of Forum councillors must (if present within 10 minutes after the time appointed for the meeting and willing to act) preside as chairperson at each meeting of Forum councillors. (c) If at a meeting of Forum councillors: (1) there is no chairperson of Forum councillors; (2) the chairperson of Forum councillors is not present within 10 minutes after the time appointed for the meeting; or (3) the chairperson of Forum councillors is present within that time but is not willing or able to act as chairperson of the meeting, then the deputy chairperson, if elected under clause 14.11, must be the chairman of the meeting, or if the deputy chairperson is not present or willing or able to act, the Forum councillors present must elect one of the Forum councillors as chairperson of the meeting. 14.11 Deputy chairperson of Forum councillors The Forum councillors may elect one or more Forum councillors as deputy chairpersons and may decide the period for which that person or persons will serve as deputy chairpersons. 14.12 Decisions of Forum councillors (a) A meeting of Forum councillors at which a quorum is present may exercise all the powers and discretions vested in or exercisable by the Forum councillors under this constitution. 23