TITJUR Enirisorse Opinion of Advocate General Stix-Hackl delivered on 7 November 2002. # Enirisorse SpA v Ministero delle Finanze. # Reference for a preliminary ruling: Corte suprema di Cassazione - Italy. # Public undertakings - Transfer to public undertakings of a proportion of port charges paid to the State - Competition - Abuse of a dominant position - State aid - Charge having equivalent effect - Internal taxation - Free movement of goods. # Joined cases C-34/01 to C-38/01.