Art.84
EU AI Act Guide › Chapter IX — Post-Market Monitoring › Article 84

Article 84 – Union AI Testing Support Structures

Governance SME Relevant ~2 min read · 423 words

Article 84 requires the Commission to establish Union-level AI testing support structures — bodies that can provide independent technical testing capabilities to market surveillance authorities across the EU. These testing support structures are the technical backbone of enforcement, providing the specialised expertise that national authorities may lack when assessing complex AI systems.

✓ Low compliance impact for SMEs

WHAT THE ARTICLE IS ABOUT

EU-level technical testing capacity for AI enforcement

Article 84 establishes the obligation to create Union AI testing support structures — facilities and bodies that provide independent technical testing and analysis of AI systems to support national market surveillance authorities. They are particularly important for complex high-risk systems and GPAI models that require specialised AI expertise to assess.

WHAT IT SAYS

Commission designates testing bodies, national authorities may use them

  • The Commission must designate one or more Union AI testing support structures — these are bodies capable of providing independent technical testing of AI systems
  • Testing support structures provide their services to national market surveillance authorities and the AI Office upon request
  • They may assist in the assessment of high-risk AI systems where the national authority lacks the technical capacity to conduct the evaluation independently
  • They may also support investigations of GPAI models where the AI Office requires technical assistance
  • The testing support structures are part of the broader EU enforcement infrastructure that ensures consistent and technically credible oversight across member states
  • The Commission may designate existing bodies — such as national laboratories, research institutes, or technical organisations — as testing support structures where they meet the required criteria

WHO IS AFFECTED

Market surveillance authorities and the AI Office primarily

  • National market surveillance authorities that may call on testing support structures during investigations
  • The AI Office for GPAI model technical assessments
  • Providers whose systems may be technically evaluated by these structures during investigations
  • The Commission which designates the structures
  • Research institutions and technical bodies that may seek designation

WHAT IT MEANS FOR SMES

Technical enforcement will be competent regardless of your member state

  • Testing support structures ensure that authorities everywhere in the EU have access to credible technical AI assessment capabilities — enforcement quality is not limited by the technical resources of your national authority
  • If your AI system is technically evaluated during an investigation, the evaluation may involve these independent testing bodies — not just the authority’s own staff
  • Independent technical evaluation by a designated testing structure carries significant weight; documentation and evidence submitted to counter a technical finding must be of equivalent rigour
  • The existence of these structures also protects SMEs from poorly-founded technical claims — assessments must be technically credible, not just regulatory assertions

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