The Security Council is one of the organs of U.N.O and it is assumed to be the most powerful of all the organs, making up the organization. Formerly, it was made up of 5 permanent members also known as the Permanent Five, Big Five, or P5 and 6 non-permanent members, but it was enlarged in 1965, bringing 6 non-permanent members to 10, making it 15 members. The permanent members are: United States of America (USA), China, Britain, France and Russia.
The President of the United Nations Security Council is the presiding officer of that body. The President is the head of the delegation from the United Nations Security Council member state that holds the rotating presidency for a tenure of One Month. the presidency rotates monthly among the state members of the Security Council. The rotation takes place in alphabetical order of the member states' official United Nations names in English.