1. Member States shall require obliged entities to retain the following documents and information in accordance with national law for the purpose of preventing, detecting and investigating, by the FIU or by other competent authorities, possible money laundering or terrorist financing:

(a) in the case of customer due diligence, a copy of the documents and information which are necessary to comply with the customer due diligence requirements laid down in Chapter II, including, where available, information obtained through electronic identification means, relevant trust services as set out in Regulation (EU) No 910/2014 or any other secure, remote or electronic, identification process regulated, recognised, approved or accepted by the relevant national authorities, for a period of five years after the end of the business relationship with their customer or after the date of an occasional transaction;

(b) the supporting evidence and records of transactions, consisting of the original documents or copies admissible in judicial proceedings under the applicable national law, which are necessary to identify transactions, for a period of five years after the end of a business relationship with their customer or after the date of an occasional transaction.