12. The Bureau shall appoint an executive director who shall direct the secretariat of the Order.
The Bureau may also appoint an assistant executive director and determine his functions.
The term of office of the executive director and of the assistant executive director shall not be limited; it may be terminated:(a) by the resignation of the executive director or of the assistant executive director, as the case may be;
(b) by a resolution of the Bureau passed by a majority of two-thirds of its members.