Portion Marking

Markings are for training use only.

For unclassified documents containing CUI, portion marking is optional, but strongly recommended.

Portion markings apply to the information immediately following the portion mark.  

If any portions are marked, then all portions will be marked.  Portions include subjects, titles, paragraphs and sub-paragraphs, bullet points and sub-bullet points, headings, pictures, graphs, charts, maps, and reference lists.  Don’t apply portion markings to the CUI designation indicator block.

When portion marking, mark all portions containing CUI with “(CUI).”  Mark portions with unclassified information with “(U).”

Portion marking is not required for sub-paragraphs or sub-bullet points if they carry the same control markings as the main paragraph or bullet point, but marking of all portions is required if any sub-paragraph or sub-bullet point has a control marking that is different from the main paragraph or bullet point.