On 15 January 2014, the Court of Justice (hereafter ‘the Court’) delivered its judgment in Association de Médiation Sociale (hereafter ‘AMS’). AMS brought for the first time before the Court the issue of horizontal applicability in relation to a provision of the EU Charter of Fundamental Rights (hereafter ‘Charter’), namely Article 27 thereof, which enshrines the right of workers to information and consultation within the undertaking. The case therefore raised questions of ‘undeniable constitutional significance’, as Advocate-General Cruz Villalón had put it in his Opinion, regarding the post-Lisbon enforcement and interpretation of the Charter and, in particular, its application to disputes between private parties.