CUI is controlled unclassified information that meets the standards for safeguarding and dissemination controls pursuant to law, regulations, and government-wide policies under Executive Order 13556.
NIST SP 800-171 provisions apply:
(i)when CUI is resident in nonfederal information systems and organizations
(ii)when the information systems where the CUI resides are not used or operated by contractors of federal agencies or other organizations on behalf of those agencies
(iii)where there are no specific safeguarding requirements for protecting the confidentiality of CUI prescribed by the authorizing law, regulation, or government-wide policy for the CUI category or subcategory listed in the CUI Registry.
NIST SP 800-171 requirements apply to all components of nonfederal information systems and organizations that process, store, or transmit CUI, or provide security protection for such components. NIST SP 800-171 is broadly applicable to any industry where CUI is processed.