The UN System Chief Executives Board for Coordination (CEB) is the longest-standing and highest-level coordination forum of the United Nations system. It meets semiannually and is chaired by the UN Secretary-General. CEB serves as an internal coordination mechanism that provides high-level system-wide strategic guidance, promotes coherent leadership, shared vision and enhanced cooperation, and considers forward-looking solutions in response to mandates stemming from the governing bodies of its member organizations.