32For the purpose of determining whether the present action is admissible, it should be noted at the outset that according to settled case-law only measures which produce binding legal effects and are capable of affecting the interests of the applicant by bringing about a distinct change in his legal position constitute measures challengeable by an action for annulment under Article 173 of the EC Treaty (now, after amendment, Article 230 EC). In the case of acts or decisions adopted by a procedure involving several stages, in particular where they are the culmination of an internal procedure, it is clear from the same case-law that, in principle, an act is reviewable only if it is a measure definitively establishing the position of the Commission at the conclusion of that procedure, and not a provisional measure intended to pave the way for the final decision (IBM v Commission, cited above, paragraphs 9 and 10).