A reference system drawn up in accordance with the rules laid down in Article L. 1110-4-1 defines the procedures for implementing the obligation to reference health data with the national health identifier provided for in III of Article R. 1111-8-1. It specifies the procedures for monitoring and managing the risks and errors associated with the identification of the persons cared for which must be implemented by the professionals, establishments, services and organisations mentioned in Article R. 1111-8-3, as well as the security measures applicable to the personal data referencing operations mentioned in the same article.