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SI-4(21) SI · System and Information Integrity

Probationary Periods

LOW MODERATE HIGH
1 Overlay 1 Related Control
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Requirements NIST SOURCE

Implement the following additional monitoring of individuals during [probationary period]: [additional monitoring].

Discussion (NIST Supplemental Guidance)

During probationary periods, employees do not have permanent employment status within organizations. Without such status or access to information that is resident on the system, additional monitoring can help identify any potentially malicious activity or inappropriate behavior.

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 SI-4(21) 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. additional monitoring to be implemented on individuals during probationary periods is defined;
  2. the probationary period of individuals is defined;
  3. <SI-04(21)_ODP[01] additional monitoring> of individuals is implemented during <SI-04(21)_ODP[02] probationary period>.

Examine

[SELECT FROM: System and information integrity policy; system and information integrity procedures; procedures addressing system monitoring; system design documentation; system monitoring tools and techniques documentation; system configuration settings and associated documentation; system monitoring logs or records; system audit records; system security plan; other relevant documents or records].

Interview

[SELECT FROM: System/network administrators; organizational personnel with information security responsibilities; organizational personnel installing, configuring, and/or maintaining the system; organizational personnel responsible for monitoring the system].

Test

[SELECT FROM: Organizational processes for system monitoring; mechanisms supporting and/or implementing a system monitoring capability].

Overlays

Showing the OT/ICS overlay for the parent control SI-4 — see the SI-4(21) 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

  • Base control: Included (matches standard baseline)

MODERATE

  • Base control: Included (matches standard baseline)
  • Included: (2) (4) (5)

HIGH

  • Base control: Included (matches standard baseline)
  • Included: (2) (4) (5) (10) (12) (14) (20) (22)

STIGs & CCIs

No STIG checks or CCI mappings are currently loaded for SI-4(21). 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

  • System and information integrity policy
  • system security plan

Configuration

  • system design documentation
  • system configuration settings and associated documentation

Testing

  • Organizational processes for system monitoring
  • mechanisms supporting and/or implementing a system monitoring capability

Other Records

  • system and information integrity procedures
  • procedures addressing system monitoring
  • system monitoring tools and techniques documentation
  • system monitoring logs or records
  • system audit records
  • other relevant documents or records