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.
United Nations Security Council Resolution 644
United Nations Security Council resolution 644, adopted unanimously on 7 November 1989, after recalling Resolution 637 (1989), the Council endorsed the report by the Secretary-General and decided to establish the United Nations Observer Group in Central America (ONUCA) in accordance with the report.