Not Releasable to Foreign Nationals (NOFORN)

When can I apply NOFORN to a CUI document?
 NOFORN can be applied to:
- unclassified intelligence information properly characterized as CUI
- Naval Nuclear Propulsion Information (NNPI)
- DoD Unclassified Controlled Nuclear Information (DCNI)
- National Disclosure Policy (NDP-1)

Before applying the NOFORN marking, consider whether it would be more appropriate to use a "Releasable to" (REL TO) marking to enhance information sharing.