3. The Committee may allow States parties to submit a combined report comprising no more than two overdue reports. Request for additional information Rule 50 1. When considering reports submitted by a State party under article 18 of the Convention, the Committee, and in particular its pre-sessional working group, shall first satisfy itself that, in accordance with the Committee’s guidelines, the report provides sufficient information. 2. If, in the opinion of the Committee, or of the pre-sessional working group, a report of a State party does not contain sufficient information, it may request the State concerned to furnish such additional information as required, indicating the time limit within which the information should be submitted. 3. The questions or comments forwarded by the pre-sessional working group to the State party whose report is under consideration and the response of the State party thereto shall, in accordance with the present rule, be circulated to members of the Committee prior to the session at which the report is to be examined. Examination of reports Rule 51 1. At each session, the Committee, based on the list of reports awaiting consideration, shall decide which reports of States parties it will consider at its subsequent session, bearing in mind the duration of the subsequent session and the criteria of date of submission and geographical balance. 2. The Committee, through the Secretary-General, shall notify the States parties as early as possible of the opening date, duration and place of the session at which their respective reports will be examined. The States parties shall be requested to confirm in writing, within a specified time, their willingness to have their reports examined. 3. The Committee at each session shall also establish and circulate to the States parties concerned a reserve list of reports for consideration at its subsequent session in the event that a State party invited in accordance with the present rule is unable to present its report. In such case, the State party chosen from the reserve list shall be invited by the Committee, through the Secretary-General, to present its report without delay. 4. Representatives of the States parties shall be invited to attend the meetings of the Committee at which their reports are to be examined. 5. If a State party fails to respond to an invitation to have a representative attend the meeting of the Committee at which its report is being examined, consideration of the report 111