Chapter IX is the operative chapter for enforcement of the Act. It sets out how providers monitor their own high-risk systems after deployment, how serious incidents are reported, how market surveillance authorities supervise and intervene, what remedies are available to affected persons, and how the AI Office enforces the GPAI obligations in Chapter V.
The Chapter is structured around five sections and runs from Article 72 to Article 94. Most provisions apply from 2 August 2026 in step with the high-risk obligations they enforce; the GPAI enforcement provisions in Section 5 apply from 2 August 2025 alongside Chapter V.
Section 1 ā Post-market monitoring (Article 72)
Providers of high-risk AI systems must establish and document a post-market monitoring system that is proportionate to the nature of the system and its risks.
The system must actively and systematically collect, document and analyse relevant data on the performance of the high-risk system throughout its lifecycle, including data provided by deployers or collected through other sources, and allow the provider to evaluate continuous compliance with the requirements in Chapter III Section 2.
The provider must follow a post-market monitoring plan that forms part of the technical documentation under Annex IV. The Commission adopts a template for the plan by implementing act.
For high-risk systems covered by Annex I product legislation, the post-market monitoring system must be integrated with the post-market surveillance system already required under that legislation, to avoid duplication.
Section 2 ā Sharing of information on serious incidents (Article 73)
Providers of high-risk AI systems placed on the EU market must report any serious incident to the market surveillance authority of the Member State where the incident occurred.
A “serious incident” under Article 3(49) covers death, serious harm to health, serious and irreversible disruption of critical infrastructure, infringement of fundamental rights obligations under Union law, or serious harm to property or the environment.
Reporting deadlines are graduated by severity:
- Immediately and no later than 15 days after the provider becomes aware of the incident;
- 10 days for serious and irreversible disruption of critical infrastructure or death;
- 2 days for widespread infringement or serious disruption.
The provider must carry out an investigation, including a risk assessment and corrective action, and cooperate with the authority.
Reporting under Article 73 is without prejudice to reporting obligations under other Union law (GDPR breach notification, NIS2 incident reporting, sectoral product safety regimes).
Section 3 ā Enforcement (Articles 74ā84)
Article 74 ā Market surveillance: Regulation (EU) 2019/1020 applies to AI systems covered by the Act, with the modifications set out in Article 74. National market surveillance authorities have full inspection, documentation and access powers, including access to source code where strictly necessary to assess conformity.
Article 75 ā Mutual assistance for GPAI systems: where a high-risk system is based on a GPAI model from the same provider, the AI Office may exercise market surveillance powers; where the model is from a different provider, mutual assistance between the national authority and the AI Office applies.
Article 76 ā Real-world testing supervision: the market surveillance authority of the Member State where testing under Article 60 takes place supervises that testing.
Article 77 ā Authorities protecting fundamental rights: national bodies protecting fundamental rights (equality bodies, ombudspersons, data protection authorities) may request and obtain access to documentation created under the Act where necessary to investigate alleged infringements of fundamental rights linked to a high-risk AI system.
Article 78 ā Confidentiality: authorities must respect the confidentiality of information and data obtained, including trade secrets, source code and personal data, subject to disclosure obligations under Union and national law.
Article 79 ā National procedure for AI systems presenting a risk: where a market surveillance authority has reason to consider that an AI system presents a risk to health, safety or fundamental rights, it carries out an evaluation, requires corrective action by the operator, and may take prohibitive or restrictive measures if the operator fails to act.
Article 80 ā Procedure for systems classified as non-high-risk under Article 6(3): where a market surveillance authority has reason to consider that a system classified by the provider as not high-risk under the Article 6(3) filter is in fact high-risk, the authority evaluates the classification and may require reclassification and the corresponding compliance measures.
Article 81 ā Union safeguard procedure: where Member States disagree on a national measure under Article 79, the Commission decides whether the measure is justified, by implementing act.
Article 82 ā Compliant systems presenting a risk: a system that meets all formal requirements but still presents a risk to health, safety or fundamental rights can be restricted by the market surveillance authority, with notification to the Commission and other Member States.
Article 83 ā Formal non-compliance: where there is non-compliance with formal requirements (CE marking, declaration of conformity, registration, technical documentation, authorised representative appointment), the market surveillance authority requires the operator to correct it within a specified period; failure to do so triggers restrictive measures.
Article 84 ā Union AI testing support structures: the Commission designates Union AI testing support structures that provide independent technical and scientific advice to market surveillance authorities.
Section 4 ā Remedies (Articles 85ā87)
Article 85 ā Right to lodge a complaint: any natural or legal person who has grounds to consider that an infringement of the Act has occurred may lodge a complaint with the relevant market surveillance authority. The authority handles the complaint in line with its procedures and informs the complainant of the outcome.
Article 86 ā Right to explanation of individual decision-making: any affected person subject to a decision taken by a deployer on the basis of the output of a high-risk AI system listed in Annex III (with some exceptions) which produces legal effects or similarly significantly affects them, has the right to obtain from the deployer clear and meaningful explanations of the role of the AI system in the decision-making procedure and the main elements of the decision taken. The right operates alongside, not instead of, rights under GDPR Article 22 and other Union or national law.
Article 87 ā Reporting of infringements and whistleblower protection: Directive (EU) 2019/1937 on whistleblower protection applies to the reporting of infringements of the Act and to the protection of persons reporting such infringements.
Section 5 ā Supervision of GPAI model providers (Articles 88ā94)
Article 88 ā Exclusive AI Office enforcement: the AI Office exercises exclusive enforcement of the Chapter V obligations on GPAI model providers. National authorities have no enforcement role for GPAI models as such, although they retain jurisdiction over AI systems built on GPAI models.
Article 89 ā Monitoring actions: the AI Office monitors compliance through its own initiative, including by carrying out evaluations and assessing reports from the Scientific Panel and other sources.
Article 90 ā Scientific Panel alerts: the Scientific Panel may issue qualified alerts to the AI Office on systemic risks at Union level, including risks from a specific GPAI model. The Office must take the alert into account and may launch monitoring actions.
Article 91 ā Power to request documentation and information: the AI Office may require GPAI providers to provide documentation, including Annex XI technical documentation, Annex XII downstream information, and any other information necessary to assess compliance.
Article 92 ā Power to conduct evaluations: the AI Office may evaluate a GPAI model, including model evaluations and adversarial testing, either directly or through independent experts. Providers must cooperate, including by providing access to the model.
Article 93 ā Power to request measures: the AI Office may require providers to take appropriate measures to comply with Chapter V, including risk mitigation, restriction, withdrawal or recall of the model. Where the provider does not comply, the Commission may impose fines under Article 101.
Article 94 ā Procedural rights: providers subject to Section 5 procedures have the procedural rights of economic operators under Regulation (EU) 2019/1020, including the right to be heard before a final decision, access to the file subject to confidentiality limits, and judicial review before the Court of Justice of the European Union.
Key compliance points
The post-market monitoring system in Article 72 is the operational mechanism through which Chapter III compliance is maintained, not just demonstrated. A static technical file at the point of placing the system on the market is not enough.
Providers need a documented, living monitoring process that produces evidence over the system’s lifecycle.
Article 73 reporting deadlines are tight and graduated. The shortest (2 days) applies to widespread infringement or serious disruption.
Operators need a triage process that can classify incidents quickly enough to meet the shortest applicable deadline, not the longest.
The Article 80 procedure on Annex III classification is the enforcement mechanism for the Article 6(3) filter.
Over-broad use of the “narrow procedural task” or “preparatory work” exceptions is detectable from the database registration and the documentation submitted under Article 6(4), and is the most likely first wave of enforcement action against providers.
Article 86 is the deployer-side individual remedy. It creates a direct compliance obligation on deployers of Annex III systems to provide explanations to affected persons. The obligation operates alongside GDPR Article 22 but is broader: it applies to legal-effect and similarly significant decisions regardless of whether the decision was solely automated, and it requires explanation of the AI system’s role, not just the existence of automated processing.
Article 87 imports the Whistleblower Directive in full. Operators with internal reporting channels must extend their scope to cover Act infringements, and the protective measures (no detriment, confidentiality, reversal of burden of proof) apply.
Chapter V enforcement (Section 5) is centralised at the AI Office. GPAI providers do not have a “lead supervisory authority” in any Member State; the Office is the sole point of contact for enforcement under Articles 88 to 94. Procedural rights under Article 94 are the operational link to the Court of Justice for judicial review.
The market surveillance authority for AI systems used by EU institutions is the European Data Protection Supervisor. AI systems used by law enforcement, border, asylum and judicial bodies are supervised by the relevant data protection authority under the Law Enforcement Directive (2016/680) or any other independent authority designated under the same conditions.
Confidentiality protection under Article 78 covers source code, model weights, training data and other trade secrets. The protection is operational, not absolute: disclosure obligations under Union and national law (including in court proceedings) override the confidentiality rule.
Last reviewed: 15 May 2026.