Case C-378/18: Judgment of the Court (Eighth Chamber) of 3 October 2019 (request for a preliminary ruling from the Bundesverwaltungsgericht — Germany) — Landwirtschaftskammer Niedersachsen v Reinhard Westphal (Reference for a preliminary ruling — Regulation (EC, Euratom) No 2988/95 — Protection of the European Union’s financial interests — Article 3(1) — Limitation period — Regulations (EEC) No 3887/92 and (EC) No 2419/2001 — Integrated administration and control system for certain Community aid schemes — Recovery of undue payments — Application of the more lenient limitation rule)