Article 356
1. Member States shall ensure that traders in investment gold keep, as a minimum, accounts of all substantial transactions in investment gold and keep the documents which enable the customers in such transactions to be identified. Traders shall keep the information referred to in the first subparagraph for a period of at least five years. 2. Member States may accept equivalent obligations under measures adopted pursuant to other Community legislation, such as Directive 2005/60/EC of the European Parliament and of the Council of 26 October 2005 on the prevention of the use of the financial system for the purpose of money laundering and terrorist financing ( 13 ) , to comply with the requirements under paragraph 1. 3. Member States may lay down obligations which are more stringent, in particular as regards the keeping of special records or special accounting requirements.