NIST SP 800-53 Rev. 5 PS-3 — Personnel Screening

What this control requires

Screen individuals before granting access to the system and rescreen them periodically based on organizational-defined conditions and frequency. Screening processes may include background investigations and agency checks, aligning with applicable laws, executive orders, and regulations. The rescreening conditions and frequency depend on the type of information processed, stored, or transmitted by the system. This control supports the Governance capability within the Personnel Security family.

In plain English

Screen individuals before granting access to the system and rescreen them periodically based on organizational-defined conditions and frequency. In practice, this means you can prove you policy management-level controls on a defined cadence.

Why it matters

SP 800-53 is the catalogue every U.S. federal authorisation (FedRAMP, FISMA, CMMC) and most regulated industries point at. A missing control surfaces as a Plan of Action & Milestones (POA&M) item that an Authorizing Official must approve before the Authority To Operate is granted or renewed.

This control is rated high. Auditors expect a named owner, a remediation SLA, and a tooling artefact that evidences continuous operation.

What an auditor looks for

A 3PAO (FedRAMP) or Independent Assessor (NIST RMF) tests against NIST SP 800-53A assessment procedures. For each control they expect a documented implementation that addresses every assessment objective (Examine, Interview, Test) and an implementation summary in the System Security Plan.

Within Personnel Security, the assessor will trace your implementation back to the catalogue reference (Control PS-3) and look for objective evidence on the latest two assessment cycles.

How to implement

Policy Management

Docs. Keep each policy in version-controlled Markdown alongside the code that implements it; ship a signed PDF snapshot at each annual review and link the SHA into the SoA.

Operational checklist

• Policy. Document the trigger, the owner and the cadence.
• Access. Document the trigger, the owner and the cadence.
• Information. Document the trigger, the owner and the cadence.
• Security. Document the trigger, the owner and the cadence.
• System. Document the trigger, the owner and the cadence.
• Scope: management, conditions, information, system, personnel, checks, capability, regulations.

Evidence to collect

• Policy Document. A signed and version-controlled policy / standard / procedure document.

Signed policy or standard documents the safeguard. Focus: Personnel Screening.

Common pitfalls

• Policies that no engineer has read; the version in Confluence drifts from the version that's actually being enforced.

How it maps to other frameworks

Computed from shared tags, control component and key-operation subjects — handy when you are reconciling controls across an audit.

• HIPAA (45 CFR Part 164) 164.512(k)(5) — Uses and disclosures for specialized government functions - Correctional institutions

Related controls in NIST SP 800-53 Rev. 5

• Control PS-3(2) — Formal Indoctrination
• Control PS-3(1) — Classified Information
• Control PS-4(1) — Post-Employment Requirements
• Control PS-3(4) — Citizenship Requirements
• Control PS-6 — Access Agreements
• Control PS-2 — Position Risk Designation

References

• NIST Computer Security Resource Center — NIST SP 800-53 Rev. 5
• Catalogue identifier: Control PS-3

Topics: governance riskpolicy management