Judgment of the Court (Sixth Chamber) of 5 October 1988 in Case 210/87: (reference to the Court for a preliminary ruling made by the Tribunale Civile e Penale, Venice): Remo Padovani and the successors of Mantovani v. Amministrazione delle Finanze dello Stato (Post-clearance recovery of an additional unpaid agricultural levy — Applicability of the principle of the protection of legitimate expectations)