NIST SP 800-53 Rev. 5 MA-5(5) — Non-System Maintenance

What this control requires

Ensure non-escorted personnel performing non-system Maintenance (e.g., physical plant, custodial) in proximity to systems have required access authorizations to prevent unauthorized access. This control supports the Access Control System capability within the Maintenance family.

In plain English

Ensure non-escorted personnel performing non-system Maintenance (e.g., physical plant, custodial) in proximity to systems have required access authorizations to prevent unauthorized access. In practice, this means you can prove you access 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.

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 Maintenance, the assessor will trace your implementation back to the catalogue reference (Control MA-5(5)) and look for objective evidence on the latest two assessment cycles.

How to implement

Physical Security

Inheritance. For cloud-only operations, inherit physical controls from the provider's SOC 2 / ISO 27001 report and document the inheritance in the SoA.

Operational checklist

• Access. Document the trigger, the owner and the cadence.
• Security. Document the trigger, the owner and the cadence.
• Physical. Document the trigger, the owner and the cadence.
• Review. Document the trigger, the owner and the cadence.
• Maintenance. Document the trigger, the owner and the cadence.
• Scope: management, access control, access authorizations, system, personnel, e, identity, review.

Evidence to collect

• Identity Scan. IAM / IdP exports — Entra ID, Okta, IAM Identity Center, Workspace directory — showing accounts, roles, MFA state and last sign-in.

Identity analytics (Okta, SailPoint, Access Analyzer) demonstrates least-privilege. Focus: Non-System Maintenance.

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.

• NIST SP 800-171 Rev. 3 3.9.2 — Personnel Termination and Transfer
• CIS Controls v8 6.7 — Centralize Access Control
• BSI C5:2020 PS-04 — Physical site access control
• SOC 2 (2017 TSC) CC6.1 — Logical Access Controls
• ISO/IEC 27001:2022 A.5.15 — Access control

Related controls in NIST SP 800-53 Rev. 5

• Control PE-8(1) — Automated Records Maintenance And Review
• Control PE-2(3) — Restrict Unescorted Access
• Control MA-3(4) — Restricted Tool Use
• Control PE-2 — Physical Access Authorizations
• Control PE-3(1) — System Access
• Control AC-5 — Separation Of Duties

References

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

Topics: identity accessidentity managementaccess reviewprivileged accessphysical security