NIST SP 800-53 Rev. 5 IR-9(1) — Responsible Personnel

What this control requires

Assigning specific personnel or roles within the organization who are responsible for responding to information spills. These individuals ensure that appropriate actions are taken, such as identifying the spilled information, alerting relevant personnel, and managing the containment and eradication process. This control supports the Responsible Personnel capability within the Incident Response family.

In plain English

Assigning specific personnel or roles within the organization who are responsible for responding to information spills. 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 Incident Response, the assessor will trace your implementation back to the catalogue reference (Control IR-9(1)) 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.
• Information. Document the trigger, the owner and the cadence.
• Process. Document the trigger, the owner and the cadence.
• Response. Document the trigger, the owner and the cadence.
• Control. Document the trigger, the owner and the cadence.
• Scope: management, actions, information, organization, personnel, capability, eradication process, policy.

Evidence to collect

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

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

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) 164.524(e) — Documentation
• NIST SP 800-171 Rev. 3 3.6.3 — Incident Response Testing
• ISO/IEC 27001:2022 A.5.13 — Labelling of information

Related controls in NIST SP 800-53 Rev. 5

• Control IR-9(3) — Post-Spill Operations
• Control SI-7(5) — Automated Response To Integrity Violations
• Control PS-8 — Personnel Sanctions
• Control PS-3(2) — Formal Indoctrination
• Control PS-4(1) — Post-Employment Requirements
• Control RA-5(4) — Discoverable Information

References

• NIST Computer Security Resource Center — NIST SP 800-53 Rev. 5
• Catalogue identifier: Control IR-9(1)

Topics: governance riskpolicy management