Table 11.3. A summary of declassification policies for the different categories

of classified information

Category of classified information

Declassification policy

Source for policy

Restricted Data (1946 Atomic Energy Act)*

�Can be published without adversely affecting the common defense and security�

Atomic Energy Act of 1946, P.L. 585, �10(b)(1)

Restricted Data (1954 Atomic Energy Act)

�Can be published without undue risk to the common defense and security�

Atomic Energy Act of 1954, 68 Stat. 941; 42 U.S.C. �2162(a)

Formerly Restricted Data

�May be published without constituting an unreasonable risk to the common defense and security�

Atomic Energy Act of 1954, 68 Stat. 941; 42 U.S.C. �2162(c)

National Security Information

Disclosure reasonably could be expected to not cause damage to the national security

Executive Order 12356, Preamble and �3.1(a)

   aThe Atomic Energy Act of 1946 was superseded by the Atomic Energy Act of 1954.Therefore, this declassification standard is no longer valid.It is included for comparison purposes only.