Article R5143-1 of the French Public Health Code
The extemporaneous preparation of veterinary medicinal products, including the extemporaneous preparation of medicated feed provided for in article L. 5143-3, is carried out in accordance with good practice, the principles of which are defined, on a proposal from the Director General of the Agence nationale de sécurité sanitaire de l’alimentation, de l’environnement et du travail, by order of the Ministers for Agriculture and Health.