Which control marking blocks sharing with foreign nationals without originator approval?

Which control marking blocks sharing with foreign nationals without originator approval?

• A. Noforn
• B. Rel to
• C. Imcon
• D. Restricted Data

Answer: (A)

Blocking sharing with foreign nationals is done with the No Foreign marking, written as Noforn. It directly signals that information cannot be shared with foreign nationals or foreign entities without explicit approval from the originator. This makes the restriction clear and enforceable across all handling levels; anyone who sees Noforn must obtain the originator’s permission before releasing to non-U.S. persons. The other markings don’t convey this specific dissemination prohibition—Rel to merely notes relevance; Imcon isn’t a standard foreign-disclosure marker; Restricted Data applies to nuclear information with its own rules, not the general no-foreign sharing directive.

Blocking sharing with foreign nationals is done with the No Foreign marking, written as Noforn. It directly signals that information cannot be shared with foreign nationals or foreign entities without explicit approval from the originator. This makes the restriction clear and enforceable across all handling levels; anyone who sees Noforn must obtain the originator’s permission before releasing to non-U.S. persons. The other markings don’t convey this specific dissemination prohibition—Rel to merely notes relevance; Imcon isn’t a standard foreign-disclosure marker; Restricted Data applies to nuclear information with its own rules, not the general no-foreign sharing directive.