The Hastening Arms Limitations Talks Act of 2025 seeks to reduce nuclear weapons threats through international negotiations and arms control measures. The bill directs the U.S. to pursue a global nuclear freeze, negotiate multilateral agreements with other nuclear-armed nations, and work toward treaties that would limit nuclear weapons testing, production, and deployment. Key provisions include pursuing a follow-up agreement to the New START Treaty with Russia, seeking ratification of the Comprehensive Nuclear-Test-Ban Treaty, encouraging a "no first use" nuclear policy among P5 nations, and convening high-level summits on nuclear disarmament. The bill also prohibits the use of federal funds for nuclear weapons testing beginning in fiscal year 2026 unless the President reports any changes to the U.S. nuclear stockpile and Congress approves the test through joint resolution. The legislation affects the Department of Energy, Department of Defense, and foreign policy agencies, with no specific new appropriations mentioned—instead imposing restrictions on existing and future funding for nuclear testing.