Case C-188/11: Judgment of the Court (Seventh Chamber) of 24 May 2012 (reference for a preliminary ruling from the Landesgericht für Zivilrechtssachen Wien — Austria) — Peter Hehenberger v Republik Österreich (Agriculture — European Agricultural Guidance and Guarantee Fund — Regulations (EC) No 1257/1999 and No 817/2004 — Financial support for agri-environmental production methods — Checks — Beneficiary of agricultural aid — Fact of having prevented an on-the-spot check from being carried out — National legislation requiring the repayment of all aid paid over several years — Whether compatible)