The Commission shall remove from the Restricted Data category such data as the Commission and the Department of Defense jointly determine relates primarily to the military utilization of atomic weapons and which the Commission and Department of Defense jointly determine can be adequately safeguarded as defense information: Provided, however, That no such data so removed from the Restricted Data category shall be transmitted or otherwise made available to any nation or regional defense organization, while such data remains defense information, except pursuant to an agreement for cooperation entered into in accordance with subsection (b) or (d) of section 2164 of this title.

In carrying out paragraph (2), information related to the design of nuclear weapons shall be restored to the Restricted Data category in accordance with regulations prescribed for purposes of such paragraph.

The Commission shall remove from the Restricted Data category such information concerning the atomic energy programs of other nations as the Commission and the Director of National Intelligence jointly determine to be necessary to carry out the provisions of section 102(d) of the National Security Act of 1947, as amended,1 and can be adequately safeguarded as defense information.

In carrying out paragraph (2), information concerning atomic energy programs of other nations shall be restored to the Restricted Data category in accordance with regulations prescribed for purposes of such paragraph.