25The Commission replies that, in this case, there has not been any infringement of the essential procedural requirements in the procedure for adoption of the contested regulation capable of resulting in its annulment. In that connection, it relies on the case-law according to which a procedural irregularity entails the annulment in whole or in part of a legislative act only if it is shown that, in the absence of such irregularity, the act might have been substantively different (Case 150/84Bernardi v Parliament [1986] ECR 1375).