The Grohe dealership agreement as notified on 12 February 1981 constitutes an infringement of Article 85 (1) of the Treaty in so far as it imposes the following obligations on plumbing and sanitary ware wholesalers:
(i) to supply Grohe plumbing fittings within the EEC only to plumbing contractors meeting the statutory, administrative or technical requirements for installing plumbing systems under the applicable national law and to supply such plumbing contractors only for use in their own plumbing contracting business and only in such quantities as they normally require for that business (clause 4.2 (a)), and,
(ii) to check when selling to other wholesalers that the other wholesaler is a member of the Grohe network (clause 4.2 b)) and generally to assist Grohe in policing its distribution system (clauses 7.1 and 7.2), to the extent that this obligation serves to support the obligation referred to in subparagraph (i).