29Furthermore, according to settled case-law, where there is a regulation on the common organisation of the markets 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 common organisation of the markets are also incompatible with such common organisation, even if the matter in question has not been exhaustively regulated by it (judgment of 26 May 2005, Kuipers, C‑283/03, EU:C:2005:314, paragraph 37 and the case-law cited).
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