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The Information Security Oversight Office (ISOO), a component of NARA, is proposing this rule pursuant to Executive Order 13556 (the Order), relating to Controlled Unclassified Information (CUI). The Order establishes an open and uniform program for managing information requiring safeguarding or dissemination controls pursuant to and consistent with law, regulations, and Government-wide policies, excluding information that is classified under Executive Order 13526, or the Atomic Energy Act, as amended. This rule sets forth guidance to agencies on safeguarding, disseminating, marking, and decontrolling CUI, self-inspection and oversight requirements, and other facets of the program.