MP.L2-3.8.4 — Mark media with necessary CUI markings and distribution limitations.

What this control requires

Mark media with necessary CUI markings and distribution limitations.

Source: CMMC L2 v2.13 MP.L2-3.8.4 / NIST SP 800-171 R2 3.8.4 (official control text).

Why this matters

This control ensures that anyone handling removable media, backup tapes, printouts, or portable storage devices immediately knows they contain Controlled Unclassified Information and understands handling restrictions. Without visible markings, employees, contractors, or visitors may inadvertently treat sensitive materials as ordinary documents or disks, leading to improper disclosure, loss during disposal, or unauthorized copying. Proper marking creates a physical barrier to accidental mishandling and enables immediate identification during security audits, data spills, or loss incidents. It protects both the organization and its customers by enforcing custody awareness at every touchpoint.

What evidence assessors expect

Assessors typically look for: photo, PDF, screenshot. FORCE coaches you through the exact implementation steps and captures each artifact in-platform.

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