Court of Justice, Opinion of Advocate General of 20 September 2007
Case C-346/06, Rechtsanwalt Dr. Dirk Rüffert, as the liquidator of the assets of Objekt und Bauregie GmbH & Co. KG v Land Niedersachsen
(Directive 96/71/EC - Posting of workers in the framework of the provision of services - Collective agreements - Minimum wage - Article 49 EC - Restriction on the freedom to provide services - Procedures for the award of public works contracts - Protection of workers and prevention of social dumping)