5 Part 5 of 6

AI Documentation Requirements

Create comprehensive documentation for AI systems including technical specifications, compliance records, audit trails, and model inventories to satisfy regulatory requirements and enable effective governance.

📄 Overview of AI Documentation

AI documentation serves multiple critical purposes: regulatory compliance, operational continuity, audit readiness, and knowledge transfer. Under the EU AI Act, high-risk AI systems require extensive technical documentation that must be maintained throughout the system's lifecycle.

Documentation Categories

Category Purpose Key Stakeholders
Technical Documentation System design, architecture, specifications Engineers, Auditors, Regulators
Compliance Records Regulatory requirement mapping, evidence Legal, Compliance, Regulators
Audit Trails System activity logs, decision records Auditors, Investigators
Model Inventories Catalog of AI systems and their status Governance, Risk Management
User Documentation Instructions for safe and effective use Deployers, End Users

💡 EU AI Act Article 11

High-risk AI systems must have technical documentation drawn up before the system is placed on the market or put into service. Documentation must demonstrate compliance with requirements and provide authorities with necessary information for assessment.

📋 Technical Documentation

Technical documentation provides a comprehensive description of the AI system enabling understanding of its design, development, and operation.

EU AI Act Technical Documentation Requirements (Annex IV)

📜
Technical File Structure
1 General description of the AI system (purpose, intended use, versions)
2 Detailed description of system elements and development process
3 Information about monitoring, functioning, and control
4 Description of risk management system
5 Description of changes made through lifecycle
6 List of harmonised standards or other solutions applied
7 Copy of EU declaration of conformity
8 Detailed description of post-market monitoring system

Model Cards

Model cards are standardized documents that communicate essential information about ML models in an accessible format.

# Model Card Template MODEL DETAILS - Model name and version - Model type/architecture - Developer and organization - Release date - License INTENDED USE - Primary intended uses - Primary intended users - Out-of-scope use cases TRAINING DATA - Data sources - Data preprocessing - Data size and characteristics EVALUATION DATA - Datasets used - Motivation for selection - Preprocessing steps PERFORMANCE METRICS - Overall performance - Disaggregated performance by group - Decision thresholds ETHICAL CONSIDERATIONS - Sensitive use cases - Known limitations - Potential harms CAVEATS AND RECOMMENDATIONS - Additional guidance - Deployment considerations

Compliance Records

Compliance records document how the organization meets regulatory requirements and provide evidence for audits and regulatory inquiries.

Essential Compliance Documents

Document Content Retention Period
Conformity Assessment Evidence of EU AI Act compliance 10 years after last unit marketed
DPIA/FRIA Data protection and rights impact assessments Duration of processing + 3 years
Risk Assessments AI risk identification and mitigation System lifecycle + 5 years
Bias Audits Fairness testing results Per jurisdiction (e.g., NYC: 4 years)
Training Records Staff AI training and competency Employment + 7 years
Vendor Assessments Third-party AI due diligence Contract term + 5 years

Compliance Record Keeping Best Practices

  • Centralized Repository: Maintain all compliance documents in a searchable, access-controlled system
  • Version Control: Track all document changes with timestamps and author information
  • Regular Reviews: Schedule periodic reviews to ensure currency and completeness
  • Cross-References: Link compliance records to relevant AI systems and risk assessments
  • Audit Trail: Log all access and modifications to compliance documents

⚠ Retention Requirements

Different jurisdictions have varying retention requirements. Organizations operating across multiple jurisdictions should retain documents for the longest applicable period. Document destruction must follow approved procedures and be logged.

📝 Audit Trails

Audit trails provide a chronological record of AI system activities, enabling investigation, accountability, and regulatory compliance.

What to Log

Event Category Specific Events Required Data
Model Lifecycle Training, deployment, updates, retirement Timestamp, actor, version, approval
Predictions/Decisions Model inputs, outputs, confidence scores Request ID, input hash, output, time
Human Overrides Cases where humans override AI decisions User, original decision, new decision, reason
Access Events System access, data access, admin actions User, action, resource, timestamp
Configuration Changes Threshold changes, feature toggles, settings Previous value, new value, approver
Incidents Errors, anomalies, security events Type, severity, response, resolution

Audit Trail Architecture

# Audit Log Entry Schema { "event_id": "uuid-v4", "timestamp": "ISO-8601 UTC", "event_type": "PREDICTION | OVERRIDE | CONFIG_CHANGE | ...", "ai_system_id": "system identifier", "model_version": "v2.3.1", "actor": { "type": "USER | SYSTEM | API", "id": "identifier" }, "context": { "request_id": "correlation id", "session_id": "user session" }, "data": { // Event-specific payload }, "integrity_hash": "SHA-256 of record" }

✅ Audit Trail Best Practices

  • Use immutable append-only log storage
  • Implement cryptographic integrity verification
  • Separate audit logs from operational data
  • Enable efficient querying for investigations
  • Establish clear retention and archival policies

📋 Model Inventories

A model inventory is a centralized catalog of all AI systems within an organization, essential for governance, risk management, and regulatory compliance.

Sample Model Inventory

Credit Risk Model Production
Risk Level:
High (EU AI Act)
Owner:
Risk Analytics Team
Last Review:
Jan 15, 2026
Version:
v3.2.1
Fraud Detection Production
Risk Level:
High (EU AI Act)
Owner:
Security Operations
Last Review:
Dec 20, 2025
Version:
v2.8.0
Chatbot Assistant Staging
Risk Level:
Limited (Transparency)
Owner:
Customer Experience
Last Review:
Jan 10, 2026
Version:
v1.0.0-beta
Legacy Recommender Retired
Risk Level:
Minimal
Owner:
Product Team
Retirement Date:
Nov 30, 2025
Archive Location:
ML Archive/2025

Model Inventory Fields

Field Description Required
System ID Unique identifier for the AI system Yes
Name & Description Human-readable name and purpose Yes
Risk Classification EU AI Act or internal risk level Yes
Owner Accountable individual or team Yes
Lifecycle Stage Development, Staging, Production, Retired Yes
Data Sources Training and inference data origins Yes
Third-Party Components External models, APIs, libraries Yes
Compliance Status Assessment results, certifications Yes
Review Schedule Next review date and frequency Yes

📚 Key Takeaways

  • 1 Technical documentation must satisfy EU AI Act Annex IV requirements for high-risk systems
  • 2 Model cards provide standardized, accessible summaries of AI system characteristics
  • 3 Compliance records require proper retention management aligned with regulatory requirements
  • 4 Audit trails must be immutable, comprehensive, and efficiently queryable
  • 5 Model inventories enable enterprise-wide AI governance and risk management