What marks should appear on CUI documents?

• A. Only the word CUI.
• B. No markers required.
• C. Clear CUI designation on the document and any related handling or category information.
• D. A date stamp.

Answer: (C)

Marking CUI documents with a clear CUI designation and the pertinent handling or category information ensures anyone who handles the material immediately understands how it must be protected. The designation signals it is controlled unclassified information, while the category information specifies the exact protections and restrictions that apply, and the handling details spell out who may access it, how it may be shared, and how it should be stored or transmitted. Merely placing the word CUI leaves out crucial guidance on access and safeguards, and a date stamp doesn’t communicate protection requirements. So the proper practice is to include both the CUI designation and the related handling or category information on the document.