Within the United Nations, the veto power is exercised in

The veto power is exercised within the United Nations in the Security Council. The Security Council is one of the six main organs of the United Nations, responsible for maintaining international peace and security. It has 15 members, 5 of which are permanent (China, France, Russia, the United Kingdom, and the United States), and 10 of which are elected by the General Assembly for a two-year term. The permanent members have the power to veto any substantive resolution, regardless of its level of international support, which means that they can block any action or decision of the Security Council.