Case C-409/06: Judgment of the Court (Grand Chamber) of 8 September 2010 (reference for a preliminary ruling from the Verwaltungsgericht Köln (Germany)) — Winner Wetten GmbH v Mayor of Bergheim (Articles 43 EC and 49 EC — Freedom of establishment — Freedom to provide services — Organisation of bets on sporting competitions subject to a public monopoly at Land level — Decision of the Bundesverfassungsgericht finding the legislation for such a monopoly incompatible with the German Basic Law, but maintaining the legislation in force during a transitional period designed to allow it to be brought into conformity with the Basic Law — Principle of the primacy of Union law — Admissibility of, and possible conditions for, a transitional period of that type where the national legislation concerned also infringes Articles 43 EC and 49 EC)