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Restricted Data

Restricted Data (RD) is a category of classified information in the United States that is defined by the Atomic Energy Act of 1954 as: all data concerning (1) design, manufacture, or utilization of atomic weapons; (2) the production of special nuclear material; or (3) the use of special nuclear material in the production of energy, but shall not include data declassified or removed from the Restricted Data category pursuant to section 142 [of the Act].

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