Case C-161/09: Judgment of the Court (First Chamber) of 3 March 2011 (Reference for a preliminary ruling from the Symvoulio tis Epikratias (Greece)) — Kakavetsos-Fragkopoulos AE Epexergasias kai Emporias Stafidas, formerly K. Fragkopoulos kai SIA OE v Normarchiaki Aftodioikisi Korinthias (Free movement of goods — Measures having an effect equivalent to quantitative restrictions — Currants — National legislation aimed at protecting the quality of the product — Restrictions imposed on marketing according to different areas of production — Justification — Proportionality)