Court of Justice 23 February 2006, C-168/04 (Commission of the European Communities v Republic of Austria.)

Opinion of the Advocate-General Opinion of the Advocate-General 1. By this action, the Commission of the European Communities seeks a declaration from the Court that, by making the posting of workers who are nationals of a non-member State by an undertaking established in another Member State subject to the acquisition by that undertaking of a document known as an ‘EU-Entsendebestätigung’ (EU