Court of Justice 27 October 2009, C-91/08 (Wall AG v La ville de Francfort-sur-le-Main and Frankfurter Entsorgungs- und Service (FES) GmbH.)

Opinion of the Advocate-General Opinion of the Advocate-General 1. By this reference for a preliminary ruling, the Landgericht Frankfurt am Main (Germany) essentially seeks to ascertain the scope of the duty of transparency and the inferences to be drawn from a breach of that duty in the context of a procedure for the award of a service concession. 2.