113Thus, in the present case, the allocation of the burden of proof as to the eligibility of the costs incurred by the beneficiary of a grant is governed by Article 1315 of the Belgian Civil Code, which provided that the party that seeks the performance of an obligation must prove the obligation and, conversely, a party that claims to have been released from an obligation must prove that it has made the payment or performed the act which has brought about the extinction of its obligation.
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