1. Short title This Act may be cited as the Disengaging Entirely From the United Nations Debacle Act of 2023 or the DEFUND Act of 2023 . 2. Repeal of United Nations Participation Act of 1945 (a) Repeal The United Nations Participation Act of 1945 ( Public Law 79–264 ; 22 U.S.C. 287 et seq. ) is repealed. (b) Termination of membership in United Nations The President shall terminate all membership by the United States in the United Nations, and in any organ, specialized agency, commission, or other formally affiliated body of the United Nations. (c) Closure of United States Mission to United Nations The United States Mission to the United Nations is closed. Any remaining functions of such office shall not be carried out. 3. Repeal of United Nations Headquarters Agreement Act (a) Repeal The Joint Resolution of August 4, 1947 (61 Stat. 756, chapter 482