11In that connection, it should be noted that the Court has consistently held that Member States are obliged under the second paragraph of Article 5 of the Treaty not to detract, by means of national legislation, from the full and uniform application of Community law or from the effectiveness of its implementing measures; nor may they introduce or maintain in force measures, even of a legislative nature, which may render ineffective the competition rules applicable to undertakings (see, in particular, the judgment in Case 231/83Cuttet v Ledere [1985] ECR 305, at paragraph 16).