The study is based on the observation of a certain inconsistency in the reasoning of the CJEU when it has had to deal with questions relating to the conduct of the EU's external relations. Indeed, an examination of the case law of this jurisdiction reveals a certain variability in its interpretation and application of international agreements concluded by the EU. It must be said that the European legal order is the result of the praetorian constructions of the CJEU, a legal order considered as a legal system in its own right, with autonomous EU law in relation to international law. But despite this affirmation of the autonomy of the European legal order, it coexists and inevitably interacts with the international legal order. This is what l...