25The Court has already held that, in order to be categorised as social security benefits, benefits must be regarded, irrespective of the characteristics peculiar to different national legal systems, as being of the same kind when their purpose and object as well as the basis on which they are calculated and the conditions for granting them are identical. On the other hand, characteristics which are purely formal must not be considered relevant criteria for the classification of the benefits (see, to that effect, Case 171/82 Valentini [1983] ECR 2157, paragraph 13).
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