Judgment of the Court (Sixth Chamber) of 29 March 2001 in Case C-62/99 (reference for a preliminary ruling from the Landesarbeitsgericht Düsseldorf): Betriebsrat der bofrost* Josef H. Boquoi Deutschland West GmbH & Co. KG v Bofrost* Josef H. Boquoi Deutschland West GmbH & Co. KG (Reference for a preliminary ruling — Article 11(1) and (2) of Directive 94/45/EC — Information to be made available by undertakings on request — Information intended to establish the existence of a controlling undertaking within a Community-scale group of undertakings)