NIST 800-171 3.1.9 (AC.L2-3.1.9): System Use Notices
Provide privacy and security notices consistent with applicable CUI rules.
CMMC Level 2 practice AC.L2-3.1.9
What 3.1.9 means in practice
Before someone signs in, the system shows a notice that it handles CUI, that use may be monitored and what rules apply. The wording comes from the CUI rules that apply to you and from your counsel, and the same notice appears on every sign-in screen people use: workstations, VPN, cloud portals and applications.
SPRS points and the CMMC POA&M
- CMMC Level 2 practice
- AC.L2-3.1.9
- SPRS points
- 1 point. When it is not met, the DoD Assessment Methodology subtracts 1 from the score of 110.
- CMMC POA&M
- Allowed. It is worth 1 point, and 32 CFR 170.21(a)(2)(ii) admits requirements worth 1 point. Conditional status also needs a score of at least 88, and the item must be closed within 180 days.
Sources: NIST SP 800-171 DoD Assessment Methodology, version 1.2.1 (June 24, 2020), Annex A; 32 CFR 170.21, Plan of Action and Milestones requirements.
What an assessor checks for 3.1.9
NIST SP 800-171A gives 2 determination statements for 3.1.9, each found satisfied or other than satisfied. Determine if:
- 3.1.9[a] privacy and security notices required by CUI-specified rules are identified, consistent, and associated with the specific CUI category.
- 3.1.9[b] privacy and security notices are displayed.
NIST SP 800-171A (June 2018), assessment objectives for 3.1.9
Evidence that shows 3.1.9 is met
- The approved notice text and the record of who approved it.
- Screenshots of the notice on workstation, VPN and web application sign-in screens.
- The Group Policy, device management or identity provider setting that displays it.
How PolicyCortex gathers the evidence
No PolicyCortex collector reads the evidence for 3.1.9. Your team provides the evidence listed above.
Meet the requirement once. Keep the evidence current.
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