The Dutch Finance Ministry said on Thursday it was "disappointed" with an EU Commission order to do away with corporate tax exemptions for six ports, including Rotterdam, Europe's largest. The measure puts the Netherlands at a disadvantage, the government said in a statement, calling on the Commission to ensure fair competition. European Union regulators told Dutch authorities on Thursday to scrap a corporate tax exemption for the ports and also ordered Belgium and France to align their port taxation systems with the bloc's state aid rules. "The Commission's decisions today regarding the Netherlands, Belgium and France make clear that if port operators generate profits from economic activities these should be taxed," European Competition Commissioner Margrethe Vestager said.