21Article 3(2) and (3) of Directive 92/50 provide:2. Contracting authorities shall ensure that there is no discrimination between different service providers.3. Member States shall take the necessary measures to ensure that the contracting authorities comply or ensure compliance with this Directive where they subsidise directly by more than 50% a service contract awarded by an entity other than themselves in connection with a works contract within the meaning of Article 1a(2) of Directive 71/305/EEC.’