DefinitionIn forcev1.0.0

Biometric categorisation system

An AI system that assigns people to categories on the basis of their biometric data. The carve-out for functions ancillary to another commercial service is narrow and is routinely read far too broadly in practice.

The official source remains authoritative. This is general information about obligations and not legal advice. See this object on the map

Address and citation

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Identifier: praxikon:eu:ai-act:definition:definitie-systeem-voor-biometrische-categorisering
Payload hash (sha256): fbcbc185dd0893403d5dd704758abe9fa3be327d9869bfb1ee5af1f03e17eb86

Citation line

Praxikon, "Biometric categorisation system", praxikon:eu:ai-act:definition:definitie-systeem-voor-biometrische-categorisering@1.0.0, dataset praxikon:sys:registry:dataset:ai-act-implementation-graph 2.1.0 (schema 1.4.0), effective_at 2026-08-08T00:00:00.000Z, known_at 2026-08-14T00:00:00.000Z, sha256 fbcbc185dd0893403d5dd704758abe9fa3be327d9869bfb1ee5af1f03e17eb86

Version: 1.0.0
Legal time (effective_at): 8 August 2026
Knowledge time (known_at): 8 August 2026
Closed on: Not closed
Application date: 1 August 2024
Topics: definitions

Review status: Placed against the official source (8 August 2026). Next check due by 4 February 2027. The check date is the knowledge date of this version; no later recheck has been recorded.

What this object links to

Every relation appears below as a path: from the source with its locator, through the conditions and exceptions of the object carrying the relation, to the consequence. A locator belongs to a statement in the data and not to a relation, so the source is the source anchor of the carrying object.

What this object is about

2 of 2 shown

The object is about this role. Undifferentiated: it does not follow that the duty rests on this role.

Source
Official fact on this object, with its locator.
- EU Artificial Intelligence Act 2024/1689
  Locator: Article 3(40)
  praxikon:eu:ai-act:source:reg-eu-2024-1689
  Open official source
Via
No condition or exception recorded on this object.
Consequence
- ActorDeployer
  praxikon:eu:ai-act:actor:deployer
- ActorProvider of an AI system
  praxikon:eu:ai-act:actor:provider

What this object states

Official fact

Attributable to a named primary source, with a locator. Where they differ, the official source prevails.

Article 3(40) defines a biometric categorisation system as an AI system for the purpose of assigning natural persons to specific categories on the basis of their biometric data, unless it is ancillary to another commercial service and strictly necessary for objective technical reasons.
- Locator: Article 3(40)praxikon:eu:ai-act:source:reg-eu-2024-1689Open official source

Our interpretation

Our own reading. It can change without the law changing, and it is not the position of a supervisory authority.

Categorising is not the same as identifying: you are not establishing who someone is, you are attaching a label. That does not make it harmless. Sorting people by sensitive attributes such as race, political opinion, trade union membership, religion or sexual orientation has been prohibited under Article 5 since 2 February 2025, and since 2 August 2026 Article 50(3) requires you to inform the people the system is applied to. The carve-out only applies where the categorisation is strictly necessary on technical grounds for another service, for example an image filter that has to locate facial features. Commercial convenience is not technical necessity.
- Locator: Article 3(40)praxikon:eu:ai-act:source:reg-eu-2024-1689Open official source

Recommended step

A practical step we consider appropriate. Not an obligation following from the Regulation.

Record for each system which categories it assigns, which biometric features it uses and for what purpose. If you rely on the carve-out, document the technical necessity in the system description, and build the Article 50(3) information duty into your user-facing notices.
- Locator: Article 3(40)praxikon:eu:ai-act:source:reg-eu-2024-1689Open official source

When this applies

No condition recorded on this object.

When this does not apply

No exception recorded on this object.

Referring to this object

Citation block

Copy this reference into your advice, article or file. The identifier, the version and the hash keep the statement findable later, even once the dataset has moved on.

Reference

Praxikon, "Biometric categorisation system",
praxikon:eu:ai-act:definition:definitie-systeem-voor-biometrische-categorisering@1.0.0,
dataset praxikon:sys:registry:dataset:ai-act-implementation-graph 2.1.0 (schema 1.4.0),
effective_at 2026-08-08T00:00:00.000Z, known_at 2026-08-08T00:00:00.000Z,
sha256 fbcbc185dd0893403d5dd704758abe9fa3be327d9869bfb1ee5af1f03e17eb86,
https://www.praxikon.com/en/verkenner/definition/definitie-systeem-voor-biometrische-categorisering
(https://www.praxikon.com/api/v1/entities?id=praxikon%3Aeu%3Aai-act%3Adefinition%3Adefinitie-systeem-voor-biometrische-categorisering&effective_at=2026-08-08&known_at=2026-08-08&lang=en, accessed 2026-08-23)

Short form

praxikon:eu:ai-act:definition:definitie-systeem-voor-biometrische-categorisering@1.0.0 (sha256 fbcbc185)

BibTeX

@misc{praxikon-eu-ai-act-definition-definitie-systeem-voor-biometrische-categorisering-1-0-0,
  author       = {{Praxikon}},
  title        = {Biometric categorisation system},
  year         = {2026},
  version      = {1.0.0},
  number       = {praxikon:eu:ai-act:definition:definitie-systeem-voor-biometrische-categorisering},
  howpublished = {AI Act Change \& Evidence Graph, dataset 2.1.0, schema 1.4.0},
  note         = {effective_at 2026-08-08T00:00:00.000Z; known_at 2026-08-08T00:00:00.000Z; sha256 fbcbc185dd0893403d5dd704758abe9fa3be327d9869bfb1ee5af1f03e17eb86},
  url          = {https://www.praxikon.com/en/verkenner/definition/definitie-systeem-voor-biometrische-categorisering},
  urldate      = {2026-08-23},
  language     = {en}
}

CSL JSON

[
  {
    "id": "praxikon:eu:ai-act:definition:definitie-systeem-voor-biometrische-categorisering@1.0.0",
    "type": "dataset",
    "title": "Biometric categorisation system",
    "container-title": "AI Act Change & Evidence Graph",
    "publisher": "Praxikon",
    "version": "1.0.0",
    "number": "praxikon:eu:ai-act:definition:definitie-systeem-voor-biometrische-categorisering",
    "URL": "https://www.praxikon.com/en/verkenner/definition/definitie-systeem-voor-biometrische-categorisering",
    "language": "en",
    "issued": {
      "date-parts": [
        [
          2026,
          8,
          8
        ]
      ]
    },
    "accessed": {
      "date-parts": [
        [
          2026,
          8,
          23
        ]
      ]
    },
    "note": "dataset praxikon:sys:registry:dataset:ai-act-implementation-graph 2.1.0; schema 1.4.0; effective_at 2026-08-08T00:00:00.000Z; known_at 2026-08-08T00:00:00.000Z; sha256 fbcbc185dd0893403d5dd704758abe9fa3be327d9869bfb1ee5af1f03e17eb86; retrieved_from https://www.praxikon.com/api/v1/entities?id=praxikon%3Aeu%3Aai-act%3Adefinition%3Adefinitie-systeem-voor-biometrische-categorisering&effective_at=2026-08-08&known_at=2026-08-08&lang=en; licence https://www.praxikon.com/nl/legal/terms"
  }
]

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