35First, given that the Italian Government disputes that the ‘basic income’ in question in the main proceedings comes within the scope of that provision, it must be noted that, where a provision of EU law, such as Article 11(1)(d) of Directive 2003/109, makes an express reference to national law, it is not for the Court to give the terms concerned an autonomous and uniform definition under EU law. Such a reference expresses the intention of the EU legislature to respect the differences between the Member States concerning the meaning and exact scope of the concepts in question. However, the absence of such autonomous and uniform definitions under EU law of the concepts of ‘social security’, ‘social assistance’ and ‘social protection’ and the reference to national law, in that provision, relating to those concepts do not mean that the Member States may undermine the effectiveness of Directive 2003/109 when applying the principle of equal treatment provided for in that provision (judgments of 24 April 2012, Kamberaj, C‑571/10, EU:C:2012:233, paragraphs 77 and 78, and of 28 October 2021, ASGI and Others, C‑462/20, EU:C:2021:894, paragraph 31).
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