NIST 800-171 Revision 3, Family Control "Access Control" (AC) outlines the requirements for controlling system access to protect Controlled Unclassified Information (CUI). It emphasizes limiting information system access to authorized users with official needs, and it details proper user access management, including identity management, authentication, and authorization.

ITAR Related: Mandates strict access control to prevent unauthorized access to controlled technical data.

CMMC 2.0 Level 1:

(i) Limit information system access to authorized users, processes acting on behalf of authorized users, or devices (including other information systems).

(ii) Limit information system access to the types of transactions and functions that authorized users are permitted to execute.