87It is settled case-law that the principle of cooperation in good faith 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 (see, to that effect, order in Zwartveld and Others, C‑2/88 IMM, EU:C:1990:315, paragraph 10).
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