61The General Court correctly inferred from this, at paragraph 61 of the judgment under appeal, that any review by that Court of the legality of a decision to initiate the formal investigation procedure must necessarily be limited and rightly concluded, at paragraph 62 of that judgment, that in an action against such a decision, where the applicants challenge the Commission’s assessment classifying the disputed measure as State aid, review by the European Union judicature is limited to ascertaining whether or not the Commission has made a manifest error of assessment.