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AC-9(3) AC · Access Control

Notification of Account Changes

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Requirements NIST SOURCE

Notify the user, upon successful logon, of changes to [security-related characteristics or parameters] during [time period].

Discussion (NIST Supplemental Guidance)

Information about changes to security-related account characteristics within a specified time period allows users to recognize if changes were made without their knowledge.

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-9(3) 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. changes to security-related characteristics or parameters of the user�s account that require notification are defined;
  2. the time period for which the system notifies the user of changes to security-related characteristics or parameters of the user�s account is defined;
  3. the user is notified, upon successful logon, of changes to <AC-09(03)_ODP[01] security-related characteristics or parameters> during <AC-09(03)_ODP[02] time period>.

Examine

[SELECT FROM: Access control policy; procedures addressing previous logon notification; system design documentation; system configuration settings and associated documentation; system audit records; system security plan; other relevant documents or records].

Interview

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

Test

[SELECT FROM: Mechanisms implementing access control policy for previous logon notification].

STIGs & CCIs

No STIG checks or CCI mappings are currently loaded for AC-9(3). 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
  • system security plan

Configuration

  • system design documentation
  • system configuration settings and associated documentation

Testing

  • Mechanisms implementing access control policy for previous logon notification

Other Records

  • procedures addressing previous logon notification
  • system audit records
  • other relevant documents or records