42 U.S.C. § 2164: International cooperation

refining, purification, and subsequent treatment of source material; civilian reactor development; production of special nuclear material; health and safety; industrial and other applications of atomic energy for peaceful purposes; and research and development relating to the foregoing: the development of defense plans; the training of personnel in the employment of and defense against atomic weapons and other military applications of atomic energy; the evaluation of the capabilities of potential enemies in the employment of atomic weapons and other military applications of atomic energy; and the development of compatible delivery systems for atomic weapons; to exchange with that nation Restricted Data concerning atomic weapons: Provided , That communication of such Restricted Data to that nation is necessary to improve its atomic weapon design, development, or fabrication capability and provided that nation has made substantial progress in the development of atomic weapons; and to communicate or exchange with that nation Restricted Data concerning research, development, or design, of military reactors, the support of a program for the control of and accounting for fissile material and other weapons material; the support of the control of and accounting for atomic weapons; the verification of a treaty; and the establishment of international standards for the classification of data on atomic weapons, data on fissile material, and related data. will promote the common defense and security interests of the United States and the nation concerned; and will not constitute an unreasonable risk to such common defense and security interests. Cooperation under this subsection shall be undertaken pursuant to an agreement for cooperation entered into in accordance with section 2153 of this title . The President may authorize any agency of the United States to communicate in accordance with the terms and conditions of an agreement for cooperation arranged pursuant to subsection (a), (b), (c), or (d), such Restricted Data as is determined to be transmissible under the agreement for cooperation involved.