Case C-121/10: Judgment of the Court (Grand Chamber) of 4 December 2013 — European Commission v Council of the European Union (Action for annulment — State aid — Article 108(1) and (2) TFEU — Aid granted by Hungary for the purchase of agricultural land — Competence of the Council of the European Union — Existing aid scheme — Appropriate measures — Two indissolubly connected aid schemes — Change of circumstances — Exceptional circumstances — Economic crisis — Manifest error of assessment — Principle of proportionality)