“…As remarked by Chamon, Wessel and Kassoti, and Bosse-Platière, Article 3(5) TEU appears to introduce an internal constitutional justification for the EU's compliance with international law, as opposed to what might be perceived as an external obligation imposed by international law onto the EU, foreign to the EU's own constitutional charter. 49 And while pre-Lisbon case law already maintained that the EU should act in line with international law, 50 in Air Transport Association of America, the Court expressly relied on Articles 3(5) and 21(1) TEU to affirm that the EU, when adopting an act, 'is bound to observe international law in its entirety, including customary international law, which is binding upon the institutions of the European Union'. 51 Although the normative force of Article 3(5) TEU remains contested, 52 the provision stipulates as a minimumand irrespective of its 'legal bite'a mandate not to breach international law.…”