A/RES/53/207 Page 3 6. Reiterates its request to the Secretary-General to take all appropriate measures, including ad hoc measures, and to submit proposals, through the Committee for Programme and Coordination, to the General Assembly at its fifty-fourth session, so as to enable the Main Committees of the General Assembly, as well as the sectoral, functional and regional bodies, effectively to review the relevant portions of the medium- term plan or its revisions, with a view to facilitating their consideration by the Committee for Programme and Coordination and the Fifth Committee; 7. Requests the Secretary-General to submit a preliminary report, in accordance with the existing mandates of the General Assembly, on possible arrangements for post-conflict rehabilitation and reconstruction, as well as on the transition from relief to development, maintaining the distinct nature of both activities, for consideration by the relevant Main Committees of the Assembly and intergovernmental bodies; II PRIORITIES 1. Stresses the importance of priority-setting as an integral part of the planning, programming and budgeting process; 2. Decides that priorities shall continue to be established in the medium-term plan, which is the principal policy directive of the United Nations, and shall guide the allocation of resources in subsequent programme budgets through the mechanisms provided for in General Assembly resolution 41/213; 3. Decides also that priorities contained in the budget outline shall be in conformity with the priorities in the medium-term plan; 4. Emphasizes that priorities, once established by the General Assembly, cannot be changed or altered unless it so decides; III REGULATIONS AND RULES GOVERNING PROGRAMME PLANNING, THE PROGRAMME ASPECTS OF THE BUDGET, THE MONITORING OF IMPLEMENTATION AND THE METHODS OF EVALUATION 1. Approves the conclusions and recommendations of the Committee for Programme and Coordination9 on the revisions to the Regulations and Rules Governing Programme Planning, the Programme Aspects of the Budget, the Monitoring of Implementation and the Methods of Evaluation; 2. Requests the Secretary-General to take the necessary action to prepare revisions to the relevant rules and to bring them to the attention of the General Assembly through the Committee before promulgation;10 IV 9 Ibid., part two, para. 52. 10 Ibid., para. 53. /...