43Regulation No 883/2004 does not set up a common scheme of social security, but allows different national social security schemes to exist and its sole objective is to ensure the coordination of those schemes. It thus allows different schemes to continue to exist, creating different claims on different institutions against which the claimant possesses direct rights by virtue either of national law alone or of national law supplemented, where necessary, by EU law (Case C-331/06 Chuck [2008] ECR I-1957, paragraph 27, and Dumont de Chassart, paragraph 40).
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