51Lastly, the Commission states that any exception made to the rules on the admissibility of an action under Article 230 EC would have serious adverse consequences for the efficiency, confidentiality and independence of OLAF's investigations. It maintains that even if the Belgian courts had rejected as inadmissible any plea of infringement of essential procedural requirements by OLAF, the present action for annulment would still not be admissible. Case C-167/02 PRothley and Others v Parliament [2004] ECR I-3149 does not lead to a different conclusion.