37Thus, an action for annulment is, in principle, only available against a measure by which the institution concerned definitively determines its position upon the conclusion of an administrative procedure. On the other hand, intermediate measures whose purpose is to prepare for the definitive decision, or measures which are mere confirmation of an earlier measure or purely implementing measures, cannot be treated as acts open to challenge, in that such acts are not intended to produce autonomous binding legal effects compared with those of the act of the EU institution which is prepared, confirmed or enforced (see, to that effect, in particular, judgments of 12 September 2006, Reynolds Tobacco and Others v Commission, C‑131/03 P, EU:C:2006:541, paragraph 55; of 6 December 2007, Commission v Ferriere Nord, C‑516/06 P, EU:C:2007:763, paragraph 29; and of 26 January 2010, Internationaler Hilfsfonds v Commission, C‑362/08 P, EU:C:2010:40, paragraph 52).
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