A/RES/62/87 24. Reaffirms section XV of its resolution 61/244 of 22 December 2006; 25. Regrets the delay in the appointment of the advisory board requested in its resolutions 57/292 and 61/251, and urges the Secretary-General to expedite the setting up of the advisory board, reflecting wide geographical representation, so that it can begin its work as a matter of priority; 26. Requests the Secretary-General to ensure that the advisory board provides, inter alia, the necessary level of technical supervision; 27. Also requests the Secretary-General to explore the experience of various international organizations that have established ad hoc expert committees to provide advice on technical aspects of their construction and/or building maintenance projects and to report to the General Assembly thereon in the context of the forthcoming sixth annual progress report; 28. Affirms that the General Assembly has the sole prerogative of deciding on any changes to the capital master plan project, budget and implementation strategy as approved in its resolutions; 29. Takes note of the proposal of the Secretary-General on the accelerated strategy IV; 30. Authorizes the Secretary-General to enter into an additional swing space arrangement needed for a single-phase renovation of the Secretariat Building as a matter of urgency; 31. Approves the changes in the schedule of the renovation of the Secretariat Building proposed by the Secretary-General in paragraph 27 of his report,1 subject to the availability of the additional swing space arrangement referred to in paragraph 30 above, and, if such arrangement is not entered into within one hundred and twenty days of the adoption of the present resolution, requests the SecretaryGeneral to proceed without further delay with the phased approach to the renovation of the Secretariat Building as approved by the General Assembly in its resolution 61/251; 32. Also approves the changes in the schedule of the renovation of the Conference Building and the General Assembly Building as proposed by the Secretary-General in paragraph 28 of his report;1 33. Requests the Secretary-General to submit to the General Assembly comprehensive information on the availability and cost of and the movement of staff to the hired swing space and to ensure that such space will be available to the United Nations as long as it is required and will entail no additional cost or further staff dislocation, bearing in mind the unique nature of the capital master plan; 34. Reaffirms paragraph 39 of its resolution 61/251 and emphasizes to the Secretary-General the importance of effectively managing the multiple staff relocations and ensuring that the swing space meets the highest standards for the safety, security, health and well-being of the staff of the United Nations and that any disruption in the work of the United Nations as a result of such temporary relocation is minimized at every stage; 35. Recalls paragraphs 51 to 56 of the report of the Board of Auditors,4 and requests the Secretary-General to expeditiously complete the geotechnical and other surveys and to provide updated information on the outstanding technical elements of the project that may have a considerable impact on the overall project, including 4