1. Account information service providers and payment initiation service providers shall access payment account data exclusively via the dedicated interface referred to in Article 35, except in the circumstances covered by Article 38(4) and (5) and Article 39.
2. Where an account information service provider or a payment initiation service provider accesses payment account data via an interface that the account servicing payment service provider makes available to its payment service users for directly accessing their payment account, in accordance with Article 38(4) and (5), or where that is the only interface accessible in accordance with Article 39, the account information service provider or the payment initiation service provider shall at all times:
(a) identify itself towards the account servicing payment service provider;
(b) rely on the authentication procedures provided by the account servicing payment service provider to the payment service user;
(c) take the necessary measure
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