1. Account servicing payment service providers that offer to a payer a payment account that is accessible online shall have in place at least one dedicated interface for the purpose of data exchange with account information and payment initiation service providers.
2. Without prejudice to Articles 38 and 39, account servicing payment service providers that offer to a payer a payment account that is accessible online and have put in place a dedicated interface as referred to in paragraph 1 of this Article, shall not be obliged to also maintain permanently another interface as fall-back for the purpose of data exchange with account information and payment initiation service providers but shall always permit access to interfaces which allow business continuity for those providers.
3. Account servicing payment service providers shall ensure that their dedicated interfaces referred to in paragraph 1 use standards of communication which are issued by European or international standardisation
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