Phase 1: You must inform the administration of any significant changes
Modify your business or facility

The principle is that any modification made by the operator to the facility, its mode of use or its surroundings, which results in a significant change to the elements of the initial declaration, authorization or registration application, must be notified to the Prefect before it is carried out (articles R. 512-33, R. 512-46-23 and R. 512-54 of Code de l’environnement ).

The notion of notable change is not defined by the public authorities, and is assessed on a case-by-case basis by the judge when a case is referred to him. As a precaution, it is advisable to keep the prefectoral authority...