48Nevertheless, it must be observed, in accordance with settled case-law, that legislation is appropriate for ensuring attainment of the objective pursued only if it genuinely reflects a concern to attain it in a consistent and systematic manner, and that exceptions to the provisions of a law can, in certain cases, undermine the consistency of that law, in particular where their scope is such that they lead to a result contrary to the objective pursued by that law (judgment of 21 July 2011, Fuchs and Köhler, C‑159/10 and C‑160/10, EU:C:2011:508, paragraphs 85 and 86).
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