Map of the AI Act
Substantial modification
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definition
Substantial modification
A change to an AI system after it has been placed on the market or put into service that the provider did not foresee in the initial conformity assessment, and that affects compliance with Chapter III, Section 2 or changes the intended purpose.
based on
- Article 3 on EUR-Lexguidance
Read the map atin force now2 Feb 20252 Aug 202527 Jul 20262 Aug 20262 Dec 20262 Aug 20272 Dec 20272 Aug 2028
Read at 2 Dec 2026. What did not yet apply on that date is not shown here. The transition period for machine-readable marking ends and the new prohibitions apply.