Case C-2/06: Judgment of the Court (Grand Chamber) of 12 February 2008 (reference for a preliminary ruling from the Finanzgericht Hamburg — Germany) — Willy Kempter KG v Hauptzollamt Hamburg-Jonas (Export of cattle — Export refunds — Final administrative decision — Interpretation of a judgment of the Court — Effect of a preliminary ruling given by the Court after that decision — Review and withdrawal — Time-limits — Legal certainty — Principle of cooperation — Article 10 EC)