3.1.9
AC.L2-3.1.9 · Level 2
Provide privacy and security notices consistent with applicable CUI rules.
NIST SP 800-171 Rev 2 · §3.1.9
Provide privacy and security notices consistent with applicable CUI rules.
Assessment objectives
From NIST SP 800-171A · 2 objectives must be met to satisfy this control
Examine
SELECT FROM: Access control policy; privacy and security policies, procedures addressing system use notification; documented approval of system use notification messages or banners; system audit logs and records; system design documentation; user acknowledgements of notification message or banner; security plan; system use notification messages; system configuration settings and associated documentation; other relevant documents or records].
Interview
[SELECT FROM: System or network administrators; personnel with information security responsibilities; personnel with responsibility for providing legal advice; system developers].
Test
[SELECT FROM: Mechanisms implementing system use notification].
Examine
SELECT FROM: Access control policy; privacy and security policies, procedures addressing system use notification; documented approval of system use notification messages or banners; system audit logs and records; system design documentation; user acknowledgements of notification message or banner; security plan; system use notification messages; system configuration settings and associated documentation; other relevant documents or records].
Interview
[SELECT FROM: System or network administrators; personnel with information security responsibilities; personnel with responsibility for providing legal advice; system developers].
Test
[SELECT FROM: Mechanisms implementing system use notification].
What we look for in practice
The following are placeholder notes that should be refined based on practice experience.
What assessors look for in practice. Documented evidence that this control is implemented across all CUI-handling systems within scope. Specific artifacts vary, but expect requests for written procedures, system configurations, and operational records demonstrating the control is active.
Common failure patterns. Typical issues include incomplete documentation, inconsistent implementation across systems, and missing periodic review records. Refine this section as your practice accumulates direct assessment experience.
Strong evidence looks like. Formal policy referencing this control, technical configurations demonstrating enforcement, periodic review logs with sign-off, and procedures for handling exceptions.
Scoring and POA&M context. 1-point control under the DoD Assessment Methodology. Lower scoring impact, but still required for full compliance. POA&M-eligible — deferral up to 180 days is allowed under conditional certification per 32 CFR 170.21.