UNESCO's Constitution was adopted in London on 16 November 1945 and sets up a General Conference, an Executive Board and a Secretariat
Background
The Constitution of the United Nations Educational, Scientific and Cultural Organization was adopted in London on 16 November 1945.
Its purpose is to contribute to peace and security by promoting collaboration among the nations through education, science and culture.
The Organization includes a General Conference, an Executive Board and a Secretariat.
The General Conference consists of the representatives of the Member States and determines the policies and main lines of work of the Organization.
The General Conference meets in ordinary session every two years.
The Executive Board is elected by the General Conference and consists of fifty-eight (58) Member States.
The English and French texts of the Constitution are equally authoritative.
In plain words
General Conference Assembly of all Member States — It determines the policies and main lines of work of UNESCO.
Executive Board 58-member governing body — It is elected by the General Conference from among Member States.
Secretariat Administrative arm — The third organ of the Organization, alongside the General Conference and Executive Board.