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AC.L1-3.1.2Transaction & Function Control

Level 1
FAR 52.204-21 b.
800-171: 3.1.2

>Control Description

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

>Cross-Framework Mappings

NIST SP 800-171

>Assessment Interview Topics

Questions assessors commonly ask

Process & Governance:

  • What is your documented process for authorizing and managing user access to systems containing CUI?
  • How do you define and document access control policies and procedures?
  • Who is responsible for reviewing and approving access requests?
  • How frequently do you review user access privileges to ensure they remain appropriate?
  • What governance framework or standards guide your access control implementation?

Technical Implementation:

  • What technical mechanisms enforce access control (authentication systems, directory services)?
  • How are access control lists (ACLs) or permissions configured and managed?
  • What tools do you use to manage and provision user access?
  • How do you technically prevent unauthorized access attempts?
  • What logging captures access control decisions and authorization checks?

Evidence & Documentation:

  • What documentation demonstrates your access control policies and procedures?
  • What access control matrices or permissions documentation can you provide?
  • What access request and approval records can you show?
  • What access review documentation demonstrates periodic reviews?
  • What audit logs demonstrate access control enforcement?
  • What screenshots or configuration exports show access control settings?

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