Judgment of the Court of 22 October 2002 in Case C-94/00 (Reference for a preliminary ruling from the Cour de cassation): Roquette Frères SA v Directeur général de la concurrence, de la consommation et de la répression des fraudes, Third party: Commission of the European Communities (Competition law — Article 14(3) and (6) of Regulation No 17 — Commission decision ordering an investigation — Provision of assistance by national authorities — Interpretation of the judgment of 21 September 1989 in Hoechst v Commission — General principles — Protection against arbitrary or disproportionate intervention by public authorities in the private activities of a legal person — Scope of the review which a competent national court is required to carry out for the purposes of authorising coercive measures against undertakings — Commission's duty to provide information — Duty to cooperate in good faith)