24However, while the establishment and application of those rules falls within the competence of the Member States, the latter must none the less exercise that competence in accordance with European Union law (see, to that effect, the judgment of 12 November 2009 in Case C-154/08 Commission v Spain, paragraph 121 and the case-law cited). In particular, they may not render the implementation of European Union law impossible or excessively difficult (see, to that effect, Case C-298/96 Oelmühle and Schmidt Söhne [1998] ECR I-4767, paragraphs 23 and 24 and the case-law cited) and, specifically, in the area of competition law, they must ensure that the rules which they establish or apply do not jeopardise the effective application of Articles 101 TFEU and 102 TFEU (see, to that effect, VEBIC, paragraph 57).
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