This legislation aims to completely sever the United States' relationship with the United Nations and its associated entities. It mandates the President to terminate all U.S. membership in the United Nations, including its organs and specialized agencies, and to close the U.S. Mission to the United Nations. The bill repeals the United Nations Participation Act of 1945 and the United Nations Headquarters Agreement Act, requiring the U.S. to withdraw from the agreement establishing the UN headquarters. The measure prohibits any U.S. funds from being appropriated or made available for contributions to the UN or its affiliated bodies, allowing exceptions only for funds facilitating the withdrawal process. It explicitly ends U.S. participation in UN peacekeeping operations, the World Health Organization, and all UN conventions and agreements. Additionally, the bill requires the United Nations to vacate any U.S. Government property and revokes diplomatic immunity for UN personnel. Any future U.S. reentry into the United Nations would require Senate advice and consent, including a mandatory right-to-withdraw provision.