# A-deviation — Certification marks and hazardous-area classifications: cross-market equivalences

For A-deviation, market / system is Europe; meaning is Information that the provisions of an EN are in conflict with national regulation shall be included in an Annex to the European Standard, called A-deviation, recorded from its source on 2026-08-11.

- **Designation:** A-deviation _(verified: appears in the quote below)_
- **Market / system:** Europe
- **Meaning:** Information that the provisions of an EN are in conflict with national regulation shall be included in an Annex to the European Standard, called A-deviation _(verified: appears in the quote below)_

## What the source says

> Information that the provisions of an EN are in conflict with national regulation shall be included in an Annex to the European Standard, called A-deviation

## Source

- https://boss.cenelec.eu/homegrowndeliverables/en/pages/adev/

Last verified: 2026-08-11. Review by: 2027-08-11.
Part of [Certification marks and hazardous-area classifications: cross-market equivalences](https://referencesource.org/certification-standards-equivalence/).