A/RES/64/269 but stresses that the overall responsibility for management of the Organization rests with the Secretary-General as the Chief Administrative Officer; 5. Affirms the need for the Secretary-General to ensure that the delegation of authority to the Department of Peacekeeping Operations and the Department of Field Support and field missions is in strict compliance with relevant resolutions and decisions, as well as relevant rules and procedures of the General Assembly on this matter; Stresses that heads of departments report to and are accountable to the 6. Secretary-General; 7. Reiterates the importance of strengthened accountability in the Organization and of ensuring greater accountability of the Secretary-General to Member States, inter alia, for the effective and efficient implementation of legislative mandates and the use of human and financial resources; Takes note of paragraphs 12 and 14 of the report of the Advisory 8. Committee, and emphasizes that all field missions shall be provided with adequate resources for the effective and efficient discharge of their respective mandates and that the transition of peacekeeping operations to peacebuilding may entail a change in resource requirements; Welcomes the improvements that have been made in the timeliness and 9. quality of budget proposals for peacekeeping operations, and encourages the Secretary-General to further intensify his efforts to that end through enhanced coordination and cooperation among missions, the Department of Field Support, the Department of Peacekeeping Operations, the Department of Management and the Department for General Assembly and Conference Management of the Secretariat; 10. Reaffirms that budget submissions should reflect management improvements and efficiency gains to be achieved and should present future strategies in that regard; 11. Stresses the importance of further steps by the Secretary-General towards improving budget presentations and making more accurate forecasts; 12. Appreciates the improved presentation by the Secretary-General of efficiency gains in peacekeeping budgets; 13. Requests the Secretary-General to intensify his efforts to achieve economies of scale within and between field missions without undermining their operational requirements and the implementation of their respective mandates and to report thereon in the context of the overview report; 14. Also requests the Secretary-General to report to the General Assembly at the main part of its sixty-fifth session on measures to address the impact of exchange rate fluctuations in the presentation of peacekeeping budgets and the management of peacekeeping accounts; 15. Notes with concern the significant amount of prior-period obligations cancelled by several missions, and reiterates its request that the Secretary-General improve control over obligations; 3