Sådan skal det være, fordi en europæisk jernbane har brug for en europæisk ordning, og ikke yderligere nationale. Dermed kan medlemsstaterne gøre ting, som de ikke længere behøver at gøre på et europæisk marked.
European requirements should apply because a European railway system requires regulations at European level rather than additional regulations at national level, because the latter would enable Member States to carry out certain activities which they no longer have to do within a European market.