# Official Sources

Primary standards provenance for the pre-approved-rollback claims.

Primary sources, verified 2026-07-26 against official upstream documentation and standards. Governance framings are non-certifying (see docs/compliance/).

## Source register

- https://csrc.nist.gov/pubs/sp/800/53/r5/upd1/final
- https://www.nist.gov/cyberframework
- https://docs.python.org/3/

## Provenance notes

- csrc.nist.gov (NIST SP 800-53, CP contingency planning) and nist.gov (Cybersecurity Framework) are the authoritative upstream references for the pre-approved-rollback claims in this skill; they describe control intent, not a certification that any specific rollback execution is compliant.

## Grounding rule

Documentation and standards describe expected behaviour and control intent. They do not prove the target's live state, that a control operated, or that a framework applies. Applicability and compliance are owner determinations; treat any such claim as `assumption` until independently observed and owner-confirmed.