AU.L2-3.3.7 — Synchronize system clocks with authoritative source
Provide a system capability that compares and synchronizes internal system clocks with an authoritative source to generate time stamps for audit records.
Verbatim NIST SP 800-171 Rev 2 requirement text (3.3.7).
How it's scored
1 point deducted from your SPRS score if unmet.
An open gap here may sit on a POA&M at conditional Level 2 certification (32 CFR 170.21), provided your total score is at least 88 of 110 — and it must close within 180 days of the conditional status date.
What an assessor checks: the 3 assessment objectives
NIST SP 800-171A determination statements, verbatim. A CMMC Level 2 assessor marks AU.L2-3.3.7 MET only when every applicable objective is satisfied — and examines evidence, not assertions.
| Objective | Determination statement |
|---|---|
| 3.3.7[a] | internal system clocks are used to generate time stamps for audit records. |
| 3.3.7[b] | an authoritative source with which to compare and synchronize internal system clocks is specified. |
| 3.3.7[c] | internal system clocks used to generate time stamps for audit records are compared to and synchronized with the specified authoritative time source. |
Where do you stand on AU.L2-3.3.7?
The free Muster Score walks all 110 requirements — including every objective above — and computes your exact SPRS score in your browser. No signup, no upload, and your answers never leave your device.
Get your free Muster Score →Requirement and objective text: NIST SP 800-171 Rev 2 / SP 800-171A (verbatim). Scoring: DoD Assessment Methodology v1.2.1; POA&M eligibility: 32 CFR 170.21. Muster is independent and not affiliated with the U.S. Department of Defense or the Cyber AB; this page is compliance information, not legal advice or a certification.