In its resolution 52/12B of 19 December 1997, the "General Assembly recognized the need to consider changes within the United Nations of a more fundamental nature than those encompassed by that resolution, and invited the Secretary General to elaborate further his proposals in that regard."
It may be recalled that the UN Secretary General, in his report to the GA (A/52/850), said that : "the year 2000 constitutes a unique and symbolically compelling moment for Member States to articulate and affirm an animating vision for the United Nations in the new era." The Secretary General proposed that the session of the General Assembly in the year 2000 be designated “The Millennium Assembly,” and that it include a summit segment that could be called “The Millennium Summit” where Heads of State and Government would be expected to participate. Moreover, he also proposed that Millennium NGO Forum be held in conjunction with the Assembly. The Secretary General also suggested that "member states consider convening a ministerial-level Special Commission to examine the relations among the various component parts of the United Nations system."