35Furthermore, according to the Court’s settled case-law, where there is a regulation on the CMO in a given sector, the Member States are under an obligation to refrain from taking any measures which might undermine or create exceptions to it. Rules which interfere with the proper functioning of a CMO are also incompatible with such common organisation, even if the matter in question has not been exhaustively regulated by it (judgment of 13 November 2019, Lietuvos Respublikos Seimo narių grupė, C‑2/18, EU:C:2019:962, paragraph 29 and the case-law cited).
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