43Moreover, it is settled case-law that the Protocol concerning the seats of the institutions is predicated on mutual respect on the part of the Member States and the Parliament for each other’s areas of competence and on a reciprocal duty of sincere cooperation (see, to that effect, judgments of 22 September 1988, France v Parliament, 358/85 and 51/86, EU:C:1988:431, paragraphs 34 and 35; of 1 October 1997, France v Parliament, C‑345/95, EU:C:1997:450, paragraphs 31 and 32; and of 13 December 2012, France v Parliament, C‑237/11 and C‑238/11, EU:C:2012:796, paragraphs 41, 42 and 60).
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