A/RES/66/288 (f) Engage high-level political leaders, provide policy guidance and identify specific actions to promote effective implementation of sustainable development, including through voluntary sharing of experiences and lessons learned; (g) Promote the science-policy interface through inclusive, evidence-based and transparent scientific assessments, as well as access to reliable, relevant and timely data in areas related to the three dimensions of sustainable development, building on existing mechanisms, as appropriate; in this regard, strengthen participation of all countries in international sustainable development processes and capacity-building especially for developing countries, including in conducting their own monitoring and assessments; (h) Enhance the participation and effective engagement of civil society and other relevant stakeholders in the relevant international forums and, in this regard, promote transparency and broad public participation and partnerships to implement sustainable development; (i) Promote the review and stocktaking of progress in the implementation of all sustainable development commitments, including commitments related to means of implementation. B. Strengthening intergovernmental arrangements for sustainable development 77. We acknowledge the vital importance of an inclusive, transparent, reformed, strengthened and effective multilateral system in order to better address the urgent global challenges of sustainable development today, recognizing the universality and central role of the United Nations and reaffirming our commitment to promote and strengthen the effectiveness and efficiency of the United Nations system. 78. We underscore the need to strengthen United Nations system-wide coherence and coordination, while ensuring appropriate accountability to Member States, by, inter alia, enhancing coherence in reporting and reinforcing cooperative efforts under existing inter-agency mechanisms and strategies to advance the integration of the three dimensions of sustainable development within the United Nations system, including through exchange of information among its agencies, funds and programmes, and also with the international financial institutions and other relevant organizations such as the World Trade Organization, within their respective mandates. 79. We emphasize the need for an improved and more effective institutional framework for sustainable development which should be guided by the specific functions required and mandates involved; address the shortcomings of the current system; take into account all relevant implications; promote synergies and coherence; seek to avoid duplication and eliminate unnecessary overlaps within the United Nations system; and reduce administrative burdens and build on existing arrangements. General Assembly 80. We reaffirm the role and authority of the General Assembly on global matters of concern to the international community, as set out in the Charter. 81. We further reaffirm the central position of the General Assembly as the chief deliberative, policymaking and representative organ of the United Nations. In this regard, we call for the Assembly to further integrate sustainable development as a key element of the overarching framework for United Nations activities and 15