EU AI Act Logging
Requirements.
EU AI Act Article 12 mandates that high-risk AI systems must automatically record events throughout their operational life. These "automatic logs" are essential for identifying emerging risks, enabling technical oversight, and documenting compliance during audits by national regulatory authorities.
Article 12: Required Data Fields
| Logging Field | Technical Requirement | Regulatory Purpose |
|---|---|---|
| Timestamp | ISO 8601 (Universal Time) | Chronological sequence audit |
| Action Attempted | Plain text description | Behavioral analysis |
| Authorization status | Binary (Pass/Fail) + Reason | Policy efficacy review |
| Agent State | JSON context snapshot | Reproduction of anomalous events |
| Tool/API called | Full URI/Function signature | Resource access tracking |
| User/Operator ID | Unique identifier | Human oversight attribution |
The Core Obligations of Article 12
Article 12 is the technical backbone for **traceability** within the EU AI Act. It requires high-risk systems to implement "logging capabilities" that enable the monitoring of operations and the identification of potentially harmful behavioral patterns.
Automated Recording
Logs must be generated without human intervention.
Operational Traceability
Events must be retrievable for 6 months minimum.
Integrity Protection
Logs must be tamper-proof and encrypted.
Article 12 Implementation Checklist
The Compliance Web
Logging is not an isolated requirement. It forms the technical evidence for several other high-priority AI Act Articles:
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