33Since, under the system laid down in the Staff Regulations or the CEOS, the person concerned must submit a complaint against the decision which he is contesting and then appeal against the decision rejecting his complaint, the Court of Justice has held that the action is admissible whether it is directed against the initial decision alone, the decision rejecting the complaint or both, provided, however, that the complaint and the appeal were lodged within the periods prescribed by Articles 90 and 91 of the Staff Regulations (Case 224/87Koutchoumoff v Commission [1989] ECR 99, paragraph 7). However, in accordance with the principle of economy of procedure, the judicature may decide that it is not appropriate to rule specifically on the claims directed against the decision rejecting the complaint where it finds that those claims have no independent content and are, in reality, the same as those directed against the decision against which the complaint has been made (see, to that effect, Vainker v Parliament, paragraph 32 above, paragraphs 7 and 8). That may, in particular, be the case where it finds that the decision rejecting the complaint, in some cases because it is implied, is purely confirmatory of the decision which is the subject of the complaint and that, therefore, the annulment of the first decision would have no effect on the legal position of the person concerned distinct from that which follows from the annulment of the second.