Technical documentation turns an AI system's design, intended purpose, controls and performance into reviewable evidence. This is general informational guidance, not legal advice: use Regulation (EU) 2024/1689, amending Regulation (EU) 2026/1744 and a system-specific assessment for decisions.
Start with role and risk tier
Document the provider, deployer, importer or distributor role, intended purpose, users, deployment context and route to market. Then record why the system is prohibited, high-risk, subject to transparency duties, GPAI-related, or outside those categories. Risk tier determines which evidence is relevant; a generic product description is not a substitute for the Act's required documentation.
Map the documentation deadline
The general application date of 2 August 2026 included Article 50 transparency obligations and other applicable provisions; it was not the general start date for the Annex III high-risk regime. Sections 1, 2 and 3 of Chapter III apply from 2 December 2027 to high-risk systems classified under Article 6(2) and Annex III, and from 2 August 2028 to those classified under Article 6(1) and Annex I. Applicability depends on the organisation's role, the AI system, the relevant provision and applicable transitional arrangements, so record the legal basis and transition analysis beside each evidence requirement.
High-risk technical documentation checklist
- System description, intended purpose, interfaces, version and operating environment.
- Development methods, architecture, computational resources and model limitations.
- Training, validation and testing data governance, provenance, characteristics and processing.
- Risk-management process, foreseeable misuse, residual risks and mitigations.
- Performance measures, accuracy, robustness, cybersecurity and known limitations.
- Human-oversight design, instructions, monitoring, logging and incident processes.
- Quality-management, change-control, supplier and post-market monitoring evidence.
- Conformity assessment records, declarations and registration information where applicable.
What changes for other tiers?
Providers of limited-risk systems may need transparency information, while deployers and providers can have separate duties. GPAI models have their own documentation and information obligations. The European Commission AI Act policy page is a useful source for current implementation information, but the Regulation controls the legal detail.
Make evidence maintainable
Assign an owner and review trigger to every document. Version the system description, datasets, evaluations and risk decisions; connect changes to release approvals, supplier reviews and post-market monitoring. Keep a traceable index so an assessor or internal reviewer can move from a requirement to the evidence and its current status.
For hands-on EU AI Act readiness support, ProtectifyAI can help scope obligations and organise evidence. Pair this work with ISO 42001 implementation support when you need a repeatable AI management system.
Common questions
Who needs EU AI Act technical documentation?
Providers of high-risk AI systems need to prepare and keep the technical documentation required by the Act's relevant provisions. Other risk tiers have different documentation and transparency duties, so the system's role and classification should be assessed first.
What should technical documentation cover?
For a high-risk system, documentation should describe the system, development and monitoring processes, data, performance, risk management, human oversight, cybersecurity and applicable conformity information, following the Act's requirements and annexes.
When should documentation be updated?
Update documentation when the system, intended purpose, data, model, supplier, controls or risk changes, and retain versioned evidence for the applicable period. The specific retention period depends on the relevant obligation.
Is this checklist legal advice?
No. It is general informational guidance to help teams organise questions and evidence. The EUR-Lex Regulation and qualified advice should be used for a system-specific legal assessment.
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