---
title: "Harmonised standard"
description: "A European standard adopted on a Commission standardisation request."
canonical: https://aigovernanceengineer.com/glossary/harmonised-standard
author: "Jorge García Aibar"
license: "CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/)"
doi: https://doi.org/10.5281/zenodo.22956197
version: "0.5.0"
updated: 2026-09-25
---

# Harmonised standard

A European standard adopted on a Commission standardisation request. Under the AI Act, conformity with one whose reference is published in the Official Journal gives a presumption of conformity with the requirements it covers; publication by CEN-CENELEC alone does not [1]. As of 2026-09-24, none is yet cited [2].

- Developed in: [ch. 22, How presumption of conformity works](https://aigovernanceengineer.com/bok/principles-and-standards#how-presumption-of-conformity-works)
- Chapters: [ch. 08, Regulatory Map](https://aigovernanceengineer.com/bok/regulatory-map) · [ch. 22, Principles & Standards](https://aigovernanceengineer.com/bok/principles-and-standards)
- Contrast with: [Common specifications](https://aigovernanceengineer.com/glossary/common-specifications) · [Harmonized Structure (ISO)](https://aigovernanceengineer.com/glossary/harmonized-structure-iso)
- In the glossary chapter: https://aigovernanceengineer.com/bok/glossary#t-harmonised-standard

## Sources

[1] Regulation (EU) 2024/1689 (AI Act), consolidated text as amended by Regulation (EU) 2026/1744 (Digital Omnibus on AI, in force 27 Jul 2026; definitions in Art. 3, incl. 3(1), 3(3) to 3(14), 3(14b), 3(20), 3(22), 3(23), 3(29) to 3(32), 3(49), 3(55) to 3(57), 3(60), 3(61), 3(63), 3(68); Arts. 4, 5, 6 (incl. 6(3) third subparagraph, profiling), 9, 10, 11, 13, 14, 15, 17, 22 to 27 (incl. 26(11)), 40, 41, 43, 47, 48, 50, 53 (incl. 53(1)(c)), 55, 57, 60, 72, 73, 86; Annexes I, III, IV). Publications Office of the EU (EUR-Lex). 2026-07-27. https://eur-lex.europa.eu/eli/reg/2024/1689/2026-07-27/eng (verified: primary)
[2] Standardisation of the AI Act (no harmonised standard yet referenced in the Official Journal, so no presumption of conformity from any standard, ISO/IEC 42001 included; page last updated 2026-08-03; none found in the Publications Office index on 2026-09-24). European Commission. 2026-08-03. https://digital-strategy.ec.europa.eu/en/policies/ai-act-standardisation (verified: primary)