working group shall be prepared in all of the official languages of the United Nations by the Secretary-General, who shall endeavour to have the documents transmitted to members of the Committee at least six weeks prior to the opening of the session. Adoption of the agenda Rule 9 The first item on the provisional agenda for any session shall be the adoption of the agenda. Revision of the agenda Rule 10 During a session, the Committee may amend the agenda and may, as appropriate, delete or defer items by the decision of a majority of the members present and voting. Additional items of an urgent nature may be included in the agenda by a majority of the members. III. MEMBERS OF THE COMMITTEE Members of the Committee Rule 11 Members of the Committee may not be represented by alternates. Term of office Rule 12 The term of office of members begins: (a) On the 1st day of January of the year after their election by the meeting of States parties and shall end on the 31st day of December four years later; (b) On the date of the approval by the Committee, if appointed to fill a casual vacancy, and shall end on the date of expiration of the term of office of the member or members being replaced. Casual vacancies Rule 13 1. A casual vacancy may occur through death, the inability of a Committee member to perform her or his function as a member of the Committee or the resignation of a member of the Committee. The Chairperson shall immediately notify the Secretary-General who shall inform the State party of the member so that action may be taken in accordance with article 17, paragraph 7, of the Convention. 100