23In support of its plea of inadmissibility, the Commission maintains that its letter of 2 October 1998 is not an act open to challenge, inasmuch as it is not in the nature of a decision. It makes several points in support of that argument.
24The Commission claims that even if the complaint that it had not acted ‘within a reasonable period of time’ was justified, that would still not entitle the applicant to challenge the letter of 2 October 1998. The applicant must either challenge the Commission's decision addressed to the Member State (Case C-367/95 P Commission v Sytraval and Brink's France [1998] ECR I-1719, paragraph 45) or, in the absence of such decision, the Commission's failure to act, under Article 175 of the Treaty. Since the applicant cannot challenge a letter from the Commission informing it of a Commission decision, still less can it challenge a letter informing it that, for the time being, no decision has been taken.
25The Commission states that where State aid is concerned it is inconceivable that a complainant should be the addressee of a decision. In that context, it could adopt, with regard to the Member State, only one of the three following decisions: that the State measure in question does not constitute ‘aid’within the meaning of Article 92(1) of the Treaty; that the measure, although constituting aid within the meaning of Article 92(1), is compatible with the common market under Article 92(2) or (3); that the procedure under Article 93(2) must be initiated. In this case, since it has taken none of those decisions, the preliminary stage remains open and the only course of action open to the applicant is that provided for in Article 175 of the Treaty (Case T-95/96 Gestevisión Telecinco v Commission [1998] ECR II-3407, paragraph 55).
26According to the Commission, the purely informative nature of the contested letter is clear from the first sentence and, more specifically, from the phrase ‘at least for the time being’ and from the statement that it did not ‘preclud[e] the possibility that State aid aspects might be involved in the case’. In the contested letter it was simply communicating to the complainant information relating to the procedural situation as it stood. Consequently the letter had no legal effects. The Commission adds that the contested letter did not define its position. It ‘accepts that the first sentence of the second paragraph of the letter of 2 October 1998 might conceivably be construed... as suggesting the existence of a Commission Decision under Article 93’. However, it contends that the applicant should have followed the usual course of action of requesting a copy of such a decision.
27The Commission also contends that the contested letter cannot constitute a decision because it was signed by a Commission official in the name of another, neither of them having a delegation of power pursuant to the Commission's Rules of Procedure authorising them to adopt decisions in the name of the college of its Members, closing the preliminary stage. The contested letter could also be considered non-existent, since ‘the precise and certain content’ of the alleged measure cannot be ascertained.
28Lastly, in the Commission's view, the applicant has no legal interest in the annulment of the letter of 2 October 1998, because it is purely informative.
29The applicant observes that the wording of the contested letter is clear. According to its terms, the preliminary phase of the investigation has come to a halt and the Commission has decided not to initiate a procedure under Article 93(2) of the Treaty, despite the serious difficulties which it is experiencing in assessing whether the aid in question is compatible with the common market. Such a letter therefore has an informative aspect and is in the nature of a decision, inasmuch as it informs the addressee of the current state of the preliminary examination and notifies it that the investigation has been terminated, or at least suspended.
30The applicant adds that for that reason it is quite obvious that the Commission clearly and unequivocally defined its position in respect of its complaint relating to Article 92 of the Treaty. The fact that the Commission may resume its investigation in the future ‘if such a move seemed appropriate’ does not imply that it has left its position undefined. According to the applicant, the Commission decided that it was not appropriate at that time to proceed with its investigations.
31It states that the Commission may define its position in accordance with Article 175 of the Treaty without adopting the measure desired or considered necessary by the person concerned (Case 8/71 Komponistenverband v Commission [1971] ECR 705, paragraph 2) or even by adopting an act which has no legal effects. Consequently the Commission has not failed to act and any action under Article 175 of the Treaty would have been declared inadmissible.
32The applicant points out that it is settled case-law that the Commission is obliged to initiate a procedure under Article 93(2) of the Treaty wherever it encounters serious difficulties in determining whether aid is compatible with the common market (Case C-198/91 Cook v Commission [1993] ECR I-2487, paragraph 29). In this case the Commission is manifestly obliged to initiate such a procedure. In its letter of 19 December 1997 the Commission recognised that the measures benefiting Deutsche Post were incompatible with the common market or that it was encountering serious difficulties in determining whether the measures were so compatible.
33Given the Commission's obligation to initiate such a procedure, its decision to defer ‘at least for the time being’ its preliminary examination of the aid measures clearly constitutes a decision within the meaning of Article 173 of the EC Treaty (now, after amendment, Article 230 EC). Such a decision has legal effects.
34First, as a ‘party concerned’, the applicant could have exercised its procedural rights if the Commission had decided to initiate the procedure under Article 93(2) of the Treaty. Secondly, according to the applicant, as long as the Commission has not formally decided to initiate that procedure the Member State concerned may still put the aid in question into effect. Thirdly, even a decision by which Commission action is suspended is capable of adversely affecting the legal position of a complainant (Case T-16/91 Rendo and Others v Commission [1992] ECR II-2417, paragraphs 51 and 52). Consequently, such a decision should not be regarded as merely a preliminary decision. The negative effects of the contested decision on the complainant's position will not be eradicated by a subsequent Commission decision to initiate a procedure under Article 93(2) of the Treaty, because the illegality of the delay in initiating such a procedure and all the effects the delay has provoked will persist.
35With regard to the argument that the content of the contested letter is imprecise and uncertain, the applicant points out that the Commission may not rely on its own failure to comply with Community law.
36Lastly, the applicant challenges the Commission's interpretation to the effect that it is inconceivable, where State aid is concerned, that the complainant should be the addressee of a decision.
37For the purposes of deciding whether the plea of inadmissibility raised by the Commission is well founded, it must be borne in mind that decisions adopted by the Commission in the field of State aid must be addressed to the Member States concerned. That is also so where such decisions concern State measures to which objection is taken in complaints, on the ground that they constitute State aid contrary to the Treaty, and the Commission refuses to initiate the procedure under Article 93(2) because it considers either that the measures complained of do not constitute State aid within the meaning of Article 92 of the Treaty or that they are compatible with the common market. Where the Commission adopts such a decision and proceeds, in accordance with its duty of sound administration, to inform the complainants of its decision, it is the decision addressed to the Member State which must form the subject-matter of any action for annulment which the complainant may bring, and not the letter to that complainant informing him of the decision (Commission v Sytraval and Brink's France, cited above, paragraph 45).
38In that connection, even though a decision terminating the investigation as to the compatibility with the Treaty of an aid measure is always addressed to the Member State concerned, a communication addressed to a complainant may outline the terms of such a decision, even if that decision has not been sent to the Member State concerned (Case T-178/94 ATM v Commission [1997] ECR II-2529, paragraphs 20, 52 and 54).
39Moreover, according to settled case-law, only a measure which produces binding legal effects such as to affect the interests of an applicant by bringing about a distinct change in his legal position is an act or decision which may be the subject of an action for annulment under Article 173 of the Treaty (see, for instance, the order of the Court of Justice in Cases C-66/91 and C-66/91 R Emerald Meats v Commission [1991] ECR I-1143, paragraph 26, and the order of the Court of First Instance in Case T-274/97 Ca'P asta v Commission [1998] ECR II-2925, paragraph 24).
40Furthermore, in the case of acts or decisions drawn up in a procedure involving several stages, and particularly at the end of an internal procedure, it is only those measures which definitively determine the position of the institution upon the conclusion of that procedure which are open to challenge and not intermediate measures whose purpose is to prepare for the final decision (Ca'Pasta ν Commission, cited above, paragraph 25).
41Therefore, in order to determine whether the application is admissible, consideration must be given to the question whether it follows from the contested letter that the Commission had resolved to terminate its examination of the question of the compatibility with the Treaty of the State aid complained of by the applicant and thus took a decision, whose addressee was in reality the Member State concerned, affecting the interests of the applicant by bringing about a distinct change in its legal position.
42In this case, it must be pointed out that in the contested letter the Commission clearly stated, first, its intention not to initiate, for the time being, a procedure under Article 93 of the Treaty for the purpose of examining the alleged aid, and secondly, that it did not ‘preclude the possibility that State aid aspects might be involved in the case’. The contested letter cannot therefore be regarded as reproducing a Commission decision bringing to a conclusion its examination of the compatibility with the Treaty of the State aid complained of by the applicant.
43Moreover, the contested letter does not contain any characterisation of the facts alleged by the applicant in its complaint with regard to Article 92 of the Treaty. In that letter the Commission does not adopt a reasoned and definitive position on the applicant's complaint with regard to Articles 92 and 93 of the Treaty. It is clear, therefore, from its content that the letter is confined to informing the applicant that the Commission's services did not, for the time being, envisage taking any action. Consequently the contested letter does not have any legal effects.
44As a result, there can in this instance be no question of any decision having been addressed to the Member State concerned. As the Commission rightly contended, since the applicant cannot challenge a Commission letter informing it of its decision in the area of State aid, still less can it challenge a letter informing it that for the time being no decision has been taken.
45That conclusion cannot be called into question by the line of argument put forward by the applicant on the basis of an alleged breach of the obligation to act. The applicant's argument to the effect that the Commission's failure to act deprives it of its procedural rights, despite the possibility of bringing an action on the basis of Article 175 of the Treaty, cannot be accepted.
46It must first be pointed out that the Commission is not allowed to perpetuate a state of inaction (Gestevisón Telecinco ν Commission, cited above, paragraph 86). The Commission is obliged to adopt, with regard to the Member State concerned, a definitive decision and that must, in accordance with the principles of sound administration, be done within a reasonable time (Gestevisón Telecinco v Commission, cited above, paragraphs 73 to 75). Were the Commission to fail to comply with that obligation, the applicant could bring an action for failure to act. If the action were held to be well founded, it would be for the Commission, in application of Article 176 of the EC Treaty (now Article 233 EC) to take the measures required to comply with the judgment.
47Moreover, it is settled case-law that when, without initiating the procedure under Article 93(2) of the Treaty, the Commission finds, on the basis of Article 93(3), that a State measure does not constitute aid, or that the measure, although constituting aid, is compatible with the common market, the parties concerned, who are entitled to the procedural guarantees provided for in Article 93(2), may challenge such a decision before the Community judicature (Commission v Sy travai and Brink's France, cited above, paragraph 47). In addition, in such an action the complainant may rely on any legal defect in the acts preparatory to the definitive decision (Case 60/81 IBM v Commission [1981] 2639, paragraph 12).
48With regard to the applicant's argument that the Member State concerned could continue to put the aid in question into effect, it must be pointed out that, according to settled case-law, the direct effect of the prohibition on implementation, referred to in the last sentence of Article 93(3) of the Treaty, extends to all aid which has been implemented without being notified and, in the event of notification, operates during the preliminary period and then, if the Commission sets in motion the contentious procedure, until the final decision (Case C-354/90 Fédération Nationale du Commerce Extérieur des Produits Alimentaires and Syndicat National des Négociants et Transformateurs de Saumon [1991] ECR I-5505, ‘PNCE’, paragraph 11). Moreover, the Commission's final decision does not have the effect of regularising ex post facto the implementing measures which were invalid because they had been taken in breach of the prohibition laid downin that article (FNCE, paragraph 16). National courts are also bound — irrespective of the Commission's final determination as to whether the aid is compatible with Article 92 of the Treaty — to require the Member State to comply, at the request of any interested party, with the prohibition on implementation set out in Article 93(3) of the Treaty {FNCE, paragraph 12).
49Finally, having regard to the considerations set out above, the applicant's argument to the effect that even an act by which Commission action is suspended is capable of affecting the legal situation of the complainant is ineffectual in this case.
50It follows from the grounds set out above that in its letter of 2 October 1998 the Commission does not definitively determine its position as regards the compatibility with the Treaty of the aid complained of by the applicant, and that that letter does not have the characteristics of an act producing binding legal effects with respect to individuals. Accordingly, the action brought under the second paragraph of Article 173 of the Treaty must be dismissed as inadmissible without there being any need to examine the other arguments put forward by the Commission.