Case C-46/18: Judgment of the Court (Second Chamber) of 11 September 2019 (request for a preliminary ruling from the Consiglio di Stato — Italy) — Caseificio Sociale San Rocco Soc. coop. arl and Others v Agenzia per le Erogazioni in Agricoltura (AGEA), Regione Veneto (Reference for a preliminary ruling – Milk and milk products sector – Quotas – Additional levy – Regulation (EEC) No 3950/92 – Article 2 – Collection of the levy by the purchaser – Deliveries exceeding the reference quantity available to producers – Amount from the price of the milk – Compulsory application of a deduction – Reimbursement of the amount of excess levy – Regulation (EC) No 1392/2001 – Article 9 – Buyer – Failure to comply with obligation to collect additional levy – Producers – Failure to comply with the monthly payment obligation – Protection of legitimate expectations)