29The applicant points out that the decisions of the Court of First Instance and the Court of Justice (Case T-75/89Brems v Council [1990] ECR II-899, upheld by the Court of Justice in Case C-70/91 PCouncil v Brems [1992] ECR I-2973) have established that a general implementing rule cannot have the effect of reducing the scope of a provision of the Staff Regulations or of defeating its purpose.