Court of Justice 30 March 2006, C-393/04 and C-41/05 (Air Liquide Industries Belgium SA v Ville de Seraing (C-393/04) and Province de Liège (C-41/05).)

Opinion of the Advocate-General Opinion of the Advocate-General I – Introduction 1. By two separate decisions, the Cour d’appel (Court of Appeal), Liège (‘the Cour d’appel’) and the Tribunal de première instance (Court of First Instance), Liège (‘the Tribunal de première instance’) have referred to the Court of Justice, pursuant to Article 234 EC, a number of questions for a preliminary ruling