This legislation requires the President to formally initiate the United States' withdrawal from the North Atlantic Treaty Organization (NATO). Within 30 days of the Act's enactment, the President must give notice of denunciation of the North Atlantic Treaty , thereby beginning the process of U.S. withdrawal. The bill asserts that NATO's original mission became irrelevant after the collapse of the Soviet Union and that its subsequent eastward expansion contributed to regional instability. It highlights that the United States has borne a disproportionate financial and military burden within the alliance, with many European members failing to meet their defense spending commitments. Furthermore, the legislation prohibits the use of any U.S. funds for contributions to NATO's common-funded budgets, including civil, military, and Security Investment Programs. This Act is intended to fulfill prior congressional requirements for authorization of withdrawal from the North Atlantic Treaty, arguing that continued U.S. membership is inconsistent with national security interests.