40That provision is intended not only to prevent the concurrent application of a number of national legislative systems and the complications which might ensue, but also to ensure that persons covered by Regulation No 883/2004 are not left without social security cover because there is no legislation which is applicable to them (see, by analogy, Case C-275/96 Kuusijärvi [1998] ECR I-3419, paragraph 28, and Case C‑619/11 Dumont de Chassart [2013] ECR, paragraph 38).
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