Case C-77/08: Judgment of the Court (Fourth Chamber) of 19 March 2009 (reference for a preliminary ruling from the Unabhängiger Finanzsenat, Außenstelle Graz — Austria) — Dachsberger & Söhne GmbH v Zollamt Salzburg, Erstattungen (Export refund — Differentiated refund — Time of the submission of the request — Export declaration — No proof of clearance for release for consumption in the destination country — Penalty)