14That court found that, pursuant to settled case-law (see in particular Case C-18/90Kziber [1991] ECR I-199 and Case C-58/93Yousfi [1994] ECR I-1353), Article 41(1) of the Agreement has direct effect such that Mrs Mesbah can rely on it before the national courts. It also held that, by virtue of the same case-law, a disability allowance such as that provided for by the Belgian law of 27 February 1987, as amended, falls within the scope ratione materiae of that provision.