> For the complete documentation index, see [llms.txt](https://www.mica.wtf/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.mica.wtf/definitions/ai-act/biometric-categorisation-system.md).

# biometric categorisation system

Definition of biometric categorisation system from Regulation (EU) 2024/1689, Article 3, point (40).

|                  |                                            |
| ---------------- | ------------------------------------------ |
| **Defined term** | biometric categorisation system            |
| **Source**       | AI Act                                     |
| **Reference**    | Article 3, point (40)                      |
| **Status**       | Published                                  |
| **Refresh rule** | Regenerate after source legal-text changes |

## Definition

> (40) biometric categorisation system means 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;

## Source

[AI Act, Article 3, point (40)](https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:02024R1689-20240712).


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