137Review by the Courts of complex economic assessments made by the Commission in exercising the discretion conferred on it by Regulation No 4064/89 must be limited to ensuring compliance with the rules of procedure and the statement of reasons, as well as the substantive accuracy of the facts, the absence of manifest errors of assessment and of any misuse of power. In particular, it is not for the General Court to substitute its own economic assessment for that of the Commission (Petrolessence and SG2R v Commission, T‑342/00, ECR, EU:T:2003:97, paragraph 101). Similarly, in assessing the need for commitments to be given in order to dispel the serious doubts raised by a concentration, it is not for the Court to substitute its own assessment for that of the Commission: the Court’s review must be limited to ascertaining that the Commission has not committed a manifest error of assessment (easyJet v Commission, paragraph 43 above, EU:T:2006:187, paragraph 128). With regard to assessment of the implementation of the commitments, the judicial review is the same as that on the compatibility of a concentration with the common market or on the need to obtain commitments in order to authorise a concentration (Petrolessence and SG2R v Commission, EU:T:2003:97, paragraphs 101 to 103).
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