AC.L2-3.1.1 — Limit system access to authorized users
Limit system access to authorized users, processes acting on behalf of authorized users, and devices (including other systems).
Verbatim NIST SP 800-171 Rev 2 requirement text (3.1.1).
How it's scored
5 points deducted from your SPRS score if unmet.
An open gap here is not POA&M-eligible (only 1-point requirements qualify under 32 CFR 170.21, with one narrow exception at SC.L2-3.13.11): it must be fully implemented before a Level 2 assessment can certify.
What an assessor checks: the 6 assessment objectives
NIST SP 800-171A determination statements, verbatim. A CMMC Level 2 assessor marks AC.L2-3.1.1 MET only when every applicable objective is satisfied — and examines evidence, not assertions.
| Objective | Determination statement |
|---|---|
| 3.1.1[a] | authorized users are identified. |
| 3.1.1[b] | processes acting on behalf of authorized users are identified. |
| 3.1.1[c] | devices (including other systems) authorized to connect to the system are identified. |
| 3.1.1[d] | system access is limited to authorized users. |
| 3.1.1[e] | system access is limited to processes acting on behalf of authorized users. |
| 3.1.1[f] | system access is limited to authorized devices (including other systems). |
Where do you stand on AC.L2-3.1.1?
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.