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NIST SP 800-53 EVIDENCE

How should AI evidence map to NIST SP 800-53?

Use the enduring federal control catalog as a traceability structure while preserving the distinction between supplied evidence and tested control effectiveness.

REVIEW FUNCTION

Turn framework language into a reviewer-readable evidence position.

The objective is not to reproduce a framework as a static list. It is to identify the current AI system, preserve the evidence supplied, record accepted support and limitations, and expose unresolved dependencies before a procurement or assurance decision.

01

Start with the review boundary

The same policy can apply to many systems, but a reviewer still needs to know which application, model, environment, data flow, owner, and deployment the evidence describes.

02

Separate mapping from effectiveness

A mapping states that an artifact is relevant to a control question. It does not by itself establish implementation, operating effectiveness, inheritance, or authorization.

  • Artifact identity and content hash
  • Control reference and review question
  • System association
  • Reviewer rationale and authority
  • Limitations, freshness, and conditions
03

Use gaps to drive remediation

Missing access records, incomplete boundary documentation, unsupported retention claims, or unverified tenant-segregation evidence should become ordered evidence actions tied to review dependencies.

ATO READINESS BASELINE

Establish what the current evidence can support.

The $3,500 fixed-scope Baseline covers one defined AI system and one review context. No annual license is required.