United Nations Security Council
The UN officially came into existence on 24 October 1945 upon ratification of the Charter by the five then-permanent members of the Security Council and by a majority of the other 46 signatories. On 17 January 1946, the Security Council met for the first time at Church House, Westminster, in London, United Kingdom.
Tenth emergency special session of the United Nations General Assembly
The mechanism of the emergency special session was created in 1950 by the General Assembly's adoption of its 'Uniting for Peace' resolution, which made the necessary changes to the Assembly's 'Rules of Procedure' at that time. The resolution likewise declared that:
... if the Security Council, because of lack of unanimity of the permanent members, fails to exercise its primary responsibility for the maintenance of international peace and security in any case where there appears to be a threat to the peace, breach of the peace, or act of aggression, the General Assembly shall consider the matter immediately with a view to making appropriate recommendations to Members for collective measures, including in the case of a breach of the peace or act of aggression the use of armed force when necessary, to maintain or restore international peace and security. If not in session at the time, the General Assembly may meet in emergency special session within twenty-four hours of the request therefor. Such emergency special session shall be called if requested by the Security Council on the vote of any seven members, or by a majority of the Members of the United Nations...