TITJUR Kampelmann and Others Judgment of the Court (Fifth Chamber) of 4 December 1997. # Helmut Kampelmann and Others v Landschaftsverband Westfalen-Lippe (C-253/96 to C-256/96), Stadtwerke Witten GmbH v Andreas Schade (C-257/96) and Klaus Haseley v Stadtwerke Altena GmbH (C-258/96). # Reference for a preliminary ruling: Landesarbeitsgericht Hamm - Germany. # Obligation to inform employees - Directive 91/533/EEC - Article 2(2)(c). # Joined cases C-253/96, C-254/96, C-255/96, C-256/96, C-257/96 and C-258/96.