Brussels, 13/09/2007 (Agence Europe) - The European Commission decided, on Wednesday 12 September, to open an official investigation into a Polish measure whereby entities liable for taxes in Poland and engaged in international maritime transportation could change the tax base for their operating profits. The investigation will assess whether tonnage tax can replace the tax levied on natural - or legal - persons that are liable for personal income tax and assess how a raft of other measures...