Case C-117/17: Judgment of the Court (Sixth Chamber) of 28 February 2018 (request for a preliminary ruling from the Tribunale amministrativo regionale per le Marche — Italy) — Comune di Castelbellino v Regione Marche and Others (Reference for a preliminary ruling — Environment — Directive 2011/92/EU — Article 4(2) and (3) and Annexes I to III — Environmental impact assessment — Authorisation to carry out work in a plant for the production of electricity from biogas without preliminary examination of the need for an environmental impact assessment — Annulment — Regularisation after the event of the authorisation on the basis of new provisions of national law without preliminary examination of the need for an environmental impact assessment)