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AC-4(9) AC · Access Control

Human Reviews

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Requirements NIST SOURCE

Enforce the use of human reviews for [information flows] under the following conditions: [conditions].

Discussion (NIST Supplemental Guidance)

Organizations define security or privacy policy filters for all situations where automated flow control decisions are possible. When a fully automated flow control decision is not possible, then a human review may be employed in lieu of or as a complement to automated security or privacy policy filtering. Human reviews may also be employed as deemed necessary by organizations.

Implementation Guidance

Engineering Interpretation

Original engineering commentary written for this explorer — not NIST source text and not authoritative guidance.

No engineering interpretation has been authored for AC-4(9) yet. This section is architected to receive it — see the Requirements and Assessment sections above for the authoritative NIST source content in the meantime.

Assessment

NIST SP 800-53A REV 5.2.0

Assessment Objectives

  1. information flows requiring the use of human reviews are defined;
  2. conditions under which the use of human reviews for information flows are to be enforced are defined;
  3. human reviews are used for <AC-04(09)_ODP[01] information flows> under <AC-04(09)_ODP[02] conditions>.

Examine

[SELECT FROM: Access control policy; information flow control policies; procedures addressing information flow enforcement; system design documentation; system configuration settings and associated documentation; records of human reviews regarding information flows; list of information flows requiring the use of human reviews; list of conditions requiring human reviews for information flows; system audit records; system security plan; privacy plan; other relevant documents or records].

Interview

[SELECT FROM: System/network administrators; organizational personnel with information security and privacy responsibilities; organizational personnel with information flow enforcement responsibilities; system developers].

Test

[SELECT FROM: Mechanisms enforcing the use of human reviews].

Overlays

Showing the OT/ICS overlay for the parent control AC-4 — see the AC-4(9) entries within each baseline below.

OT/ICS Overlay SP 800-82r3

NIST SP 800-82r3 Appendix F, Table 22. Blank baseline means the control/control enhancement is not selected in that initial OT baseline.

LOW

Not applicable at this tier.

MODERATE

  • Base control: Included (matches standard baseline)

HIGH

  • Base control: Included (matches standard baseline)
  • Included: (4)

STIGs & CCIs

No STIG checks or CCI mappings are currently loaded for AC-4(9). This section is architected to display, per product: STIG ID, Finding ID, Severity, Title, Description, Check, Fix, CCI, and NIST control mapping — but nothing is populated here until a real DISA STIG/CCI dataset is ingested.

Learn more about STIG/CCI integration →

Evidence

Potential Evidence — Derived

Categorized from the SP 800-53A "Examine"/"Test" artifact list above by keyword — not an authoritative NIST evidence list.

Policy

  • Access control policy
  • information flow control policies
  • system security plan
  • privacy plan

Configuration

  • system design documentation
  • system configuration settings and associated documentation

Testing

  • Mechanisms enforcing the use of human reviews

Other Records

  • procedures addressing information flow enforcement
  • records of human reviews regarding information flows
  • list of information flows requiring the use of human reviews
  • list of conditions requiring human reviews for information flows
  • system audit records
  • other relevant documents or records