On April 8, 2024, the French Data Protection Authority (CNIL) published recommendations on the development phase of artificial intelligence (AI) systems1 (Recommendations). They are the first set of recommendations designed to guide the various players in the AI ecosystem on how to apply the General Data Protection Regulation (GDPR) to the development of AI systems. The Recommendations are relevant to providers and users of AI systems who process personal data as part of the development of such systems, including fine-tuning already-existing AI systems.