Pharmacists working in the internal-use pharmacies of the establishments, services or organisations mentioned in Article R. 5126-1 shall inform the operator defined in 3° of Article R. 5124-2, in particular via the emergency call centres or any equivalent system mentioned in Article R. 5124-49-1, of supply shortages for a medicinal product which they supply and which they have not already been informed of by the operator or by the Agence nationale de sécurité du médicament et des produits de santé, and may request an emergency supply.