49Furthermore, it should be noted that, under the principle of sincere cooperation enshrined in Article 4(3) TEU, the European Union and the Member States must, in full mutual respect, assist each other in carrying out tasks which arise from the Treaties. In that regard, the Court has held, inter alia, that that principle not only obliges the Member States to take all the measures necessary to guarantee the application and effectiveness of EU law but also imposes on the EU institutions mutual duties to cooperate in good faith with the Member States (judgments of 4 September 2014, Spain v Commission, C‑192/13 P, EU:C:2014:2156, paragraph 87, and of 19 December 2019, Amoena, C‑677/18, EU:C:2019:1142, paragraph 55).
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