The organ of the UNO which can impose mandatory sanctions on any of its members is the

The United Nations Security Council is the organ of the UN that has the power to impose mandatory sanctions on any of its member countries. The Security Council is responsible for maintaining international peace and security and has the authority to take actions such as imposing sanctions, authorizing military interventions, and establishing peacekeeping missions. When the Security Council determines that a country's actions threaten international peace and security, it can adopt resolutions that impose economic or other types of sanctions on that country. These sanctions may include restrictions on trade, travel, and other activities, and are designed to pressure the targeted country to change its behavior. Overall, the ability of the Security Council to impose mandatory sanctions is an important tool in maintaining international peace and security and promoting the goals of the United Nations.