(19)Electricity and gas are treated as goods for VAT purposes. It is, however, particularly difficult to determine the place of supply. In order to avoid double taxation or non taxation and to attain a genuine internal market free of barriers linked to the VAT regime, the place of supply of gas through the natural gas distribution system, or of electricity, before the goods reach the final stage of consumption, should therefore be the place where the customer has established his business. The supply of electricity and gas at the final stage, that is to say, from traders and distributors to the final consumer, should be taxed at the place where the customer actually uses and consumes the goods.