- Use the marking scheme from the National Archives' CUI Registry and the contract's requirements rather than inventing local labels.
- Marking discipline depends on knowing which media hold CUI — this requirement leans directly on the media register behind 03.08.01.
03.08.04OFFICIAL TITLEPENDING NIST SME REVIEW
03.08.04 — Media Marking
03.08 Media Protection · NIST SP 800-171 Rev. 3
Independent summary of the official requirement
Requires marking system media that contain CUI to indicate distribution limitations, handling caveats, and applicable CUI markings.
Rev. 3 requirement text is multi-part and parameterized with organization-defined values, so this site summarizes rather than reproduces it. The summary is independent — read the official publication for the binding wording.
NIST SP 800-171 Rev. 3 — Protecting CUI in Nonfederal Systems ↗NIST SP 800-171A Rev. 3 — Assessing Security Requirements for CUI ↗Independent interpretation
What this requirement is after
A drive or folder of CUI that looks like any other gets handled like any other. Marking makes protection obligations visible at the point of handling — labels on physical media and marking conventions for documents that follow the CUI program's rules, not locally invented ones.
Mapped practices
Brilliant at the Basics practices that support this requirement
No practice maps to this requirement — deliberately.
The campaign’s twenty practices are a priority list, not a control catalog, and none of them works this requirement’s substance directly. It still applies to you if it is in your contract’s scope: address it through your own implementation and the related artifacts below, and treat the absence of a mapping here as honesty, not permission to skip it.
Doing the work
Implementation considerations and evidence
- Marked media observable in a walkthrough or sampled records
- The marking procedure aligned to CUI Registry conventions
Artifacts
Templates and worksheets with a mapped relationship
No artifact in the library names this requirement yet. The library index groups everything by category and practice.
The other revision
Where this came from in Rev. 2
Provenance
Sources and review status
| Primary sources | NIST SP 800-171 Rev. 3 — Protecting CUI in Nonfederal Systems · NIST SP 800-171A Rev. 3 — Assessing Security Requirements for CUI |
|---|---|
| Review status | Pending NIST SME review |
| Content version | 1.0 |
| Updated |