C8. Fine-Tuning Provider Boundary Determination Documents whether fine-tuning a GPAI model constitutes a substantial modification under Article 3(23), triggering the provider boundary shift under Article 25(1)(b) and full Article 16 obligations. Evaluates the fine-tuning against each substantial modification criterion. Where provider status is triggered, the full set of Article 16 obligations is mapped. Responsible party: AI System Assessor conducts. AI Governance Lead and Legal and Regulatory Advisor approve. Regulations addressed: Article 3(23) (substantial modification); Article 25(1)(b) (provider boundary shift); Article 16 (provider obligations); Articles 43, 47. Key outputs

• Per-criterion substantial modification assessment
• Provider obligation mapping (if triggered)