An Act to amend the Atomic Energy Act of 1946, as amended
PL 82-235 (S.2233), enacted 10/30/1951

692 
October 30,1951 
[S. 2233] 
PUBLIC LAW 235—OCT. 30, 1951 
[65 STAT. 
Public Law 235 
CHAPTER 633 
AN ACT 
To amend the Atomic Energy Act of 1946, as amended. 
Atomic Energy Act 
of 1946, amendments. 
60 Stat. 760. 
42 U. S. C. § 1805. 
42 U. S. C. i 1810. 
Communication of 
certain restricted data 
to other nations. 
Restrictions. 
Determination b y 
the President. 
Informing of Joint 
Committee. 
Be it enacted by the Senate and Hoiise of Representatives 
of the 
United States of America in Congress assembled^ That section 5 (a) 
(3) of the Atomic Energy Act of 1946, as amended, is amended to read 
as follows: 
"(3) PROHIBITION.—It shall be milawful for any person to (A) 
possess or transfer any fissionable material, except as authorized by 
the Commission; or (B) export from or import into the United 
States any fissionable material; or (C) directly or indirectly engage 
in the production of any fissionable material outside of the United 
States, except, subject to the limitations and conditions contained in 
section 10 (a) (3), as authorized by the Commission upon a determina-
tion by the President that the common defense and security will not 
be advei*sely affected thereby." 
Section 10 (a) is hereby amended by inserting the following sub-
section 10 (a) (3) after subsection 10 (a) (2) : 
"(3) Nothing contained in this section shall prohibit the Commis-
sion, when in its unanimous judgment the common defense and secu-
rity would be substantially promoted and would not be endangered, 
subject to the limitations hereinafter set out, from entering into spe-
cific arrangements involving the communication to another nation of 
restricted data on refining, purification, and subsequent treatment of 
source materials; reactor development; production of 
fissionable 
materials; and research and development relating to the foregoing: 
Provided^ 
"(1) that no such arrangement shall involve the communica-
tion of restricted data on design and fabrication of atomic 
weapons; 
"(2) that no such arrangement shall be entered into with any 
nation threatening the security of the United States; 
"(3) that the restricted data involved shall be limited and cir-
cumscribed to the maximum degree consistent with the common 
defense and security objective in view, and that in the judgment of 
the Commission the recipient nation's security standards appli-
cable to such data are adequate; 
"(4) that the President, after securing the written recom-
mendation of the National Security Council, has determined in 
writing (incorporating the National Security Council recom-
mendation) that the arrangement would substantially promote 
and would not endanger the common defense and security of the 
United States, giving specific consideration to the security sensi-
tivity of the restricted data involved and the adequacy and suf-
ficiency of the security safeguards undertaken to be maintained 
by the recipient nation; and 
"(5) that before the arrangement is consummated by the Com-
mission the Joint Committee on Atomic Energy has been fully 
informed for a period of thirty days in which the Congress was 
in session (in computing such thirty days, there shall be excluded 
the days on which either House is not in session because of an 
adjournment of more than three days)." 
Approved October 30, 1951.