Fifteen seats, nine votes and the concurrence of the permanent members: the Security Council in the Charter

Background

This background goes with the United Nations peacekeeping and political missions that the Security Council creates and brings to an end.
Chapter V of the Charter of the United Nations, Articles 23 to 32, sets out how the Security Council is built and how it votes.
Article 23 says the Council shall consist of fifteen Members of the United Nations.
Five are named in the Article as permanent members, and the General Assembly elects ten other Members as non-permanent members.
A non-permanent member is elected for a term of two years and is not eligible for immediate re-election.
Each member of the Council has one vote.
A decision on a procedural question needs the affirmative vote of nine members; on all other matters it needs the affirmative vote of nine members including the concurring votes of the permanent members.
The Charter also gives the Council primary responsibility for the maintenance of international peace and security.