This legislation, known as the "123 GO Act," aims to significantly boost the global competitiveness of the United States' nuclear sector, aligning with the Sense of Congress supporting advanced nuclear reactor technologies for national security. It mandates the Secretary of State to lead diplomatic efforts to negotiate and secure at least 20 new "123 agreements" for nuclear cooperation by January 3, 2029, and to renegotiate or renew existing agreements set to expire within ten years. Additionally, the Act establishes a comprehensive program to enhance the ability of U.S. nuclear suppliers, investors, and lenders to compete for international nuclear projects. This program involves expediting intergovernmental agreements, promoting adherence to international nuclear liability conventions, and addressing regulatory burdens to encourage foreign countries to adopt U.S. nuclear technology and services.