The High Level Political Forum on Sustainable Development (HLPF) was established in June 2013 through a Resolution by the UN General Assembly as the main forum for sustainable development issues within the UN framework. Its establishment is one the main outcomes of the Rio+20 conference on sustainable development (see para 84 of the Rio+20 Outcome Document "The Future We Want". The HLPF replaces the Commission for Sustainable Development, a functional commission in the UN Economic and Social Council, established at the 1992 in the World Summit on Sustainable Development.
The HLPF is mandated to provide political leadership and guidance; to address new and emerging sustainable development challenges; and to enhance the integration of economic, social and environmental dimensions of sustainable development. In that regard, the HLPF is also an important forum to bring together the expertise from UN agencies and programmes from the economic, social and environmental field, all working on sustainable development.
The HLPF will play a key role in monitoring and reviewing the implementation of the post-2015 agenda, including the Sustainable Development Goals, to be agreed at a summit in September 2015.
The HLPF meets every four years at the level of Heads of State and Government under the auspices of the General Assembly (2013, 2017, 2021 etc.) and every year under the auspices of the UN Economic and Social Council (ECOSOC).
Commission President Barroso attended the inaugural meeting of the HLPF in 2013 (speech 13/731).
At its meeting in 2014, the HLPF discussed a wide range of topics under the theme "Achieving the Millennium Development Goals and charting the way for an ambitious post-2015 development agenda, including the sustainable development goals".
See the joint statement on the Ministerial Declaration by the EU Commissioners for the Environment, Janez Potočnik, and for Development, Andries Piebalgs.
The 2015 meeting of the HLPF, which includes a three day ministerial segment, will take place from 28 June to 10 July 2015 and will be dedicated to the theme: "Strengthening integration, implementation and review - the HLPF after 2015."
You can find more information and relevant documents here.