Article 198
1. Where specific transactions relating to investment gold between a taxable person who is a member of a regulated gold bullion market and another taxable person who is not a member of that market are taxed pursuant to Article 352, Member States shall designate the customer as the person liable for payment of VAT. If the customer who is not a member of the regulated gold bullion market is a taxable person required to be identified for VAT purposes in the Member State in which the tax is due solely in respect of the transactions referred to in Article 352, the vendor shall fulfil the tax obligations on behalf of the customer, in accordance with the law of that Member State. 2. Where gold material or semi-manufactured products of a purity of 325 thousandths or greater, or investment gold as defined in Article 344(1) is supplied by a taxable person exercising one of the options under Articles 348, 349 and 350, Member States may designate the customer as the person liable for payment of VAT. 3. Member States shall lay down the procedures and conditions for implementation of paragraphs 1 and 2.