49Since Community law does not detract from the power of the Member States to organise their own social security systems (Case C-385/99 Müller-Fauré and Van Riet [2003] ECR I-4509, paragraph 100), in the absence of harmonisation at Community level it is for the legislation of the Member State concerned to determine the range of insured persons and the level of contributions payable by insured persons to the national social security system and the respective reductions. Further, it falls within the internal process of such a system to allow entitlement to reductions in contributions only to persons liable to pay them, that is to say, persons insured under that system.
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