Case C-412/11: Judgment of the Court (First Chamber) of 11 July 2013 — European Commission v Grand Duchy of Luxembourg (Failure of a Member State to fulfil obligations — Transport — Development of the Community’s railways — Directive 91/440/EEC — Article 6(3) and Annex II — Directive 2001/14/EC — Article 14(2) — Independence of the body to which the exercise of essential functions is entrusted)