2. Special cases of anteriority

In the event of a change in nomenclature, it is imperative not to let the one-year period elapse from the entry into force of the decree modifying the nomenclature.

Article L. 513-1 of the French Environment Code stipulates that "Installations which, after having been duly commissioned, are subject to authorization, registration or declaration by virtue of a decree relating to the nomenclature of classified installations, may continue to operate without such authorization, registration...