# Official Sources

Primary standards provenance for the exception-governance and separation-of-duties 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.iso.org/standard/27001
- https://csrc.nist.gov/glossary/term/separation_of_duty

## Provenance notes

- csrc.nist.gov (NIST SP 800-53 and the separation-of-duty glossary term) and ISO/IEC 27001 are the authoritative upstream references for the exception-governance and separation-of-duties claims in this skill; they describe control intent, not a certification that any specific exception is properly governed.

## 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.