Case C-364/10: Judgment of the Court (Grand Chamber) of 16 October 2012 — Hungary v Slovak Republic (Failure of a Member State to fulfil obligations — Article 259 TFEU — Citizenship of the European Union — Article 21 TFEU — Directive 2004/38/EC — Right to move within the territory of the Member States — President of Hungary — Prohibition on entering the territory of the Slovak Republic — Diplomatic relations between Member States)