2.   Changes in the interest or exchange rates may be applied immediately and without notice, provided that such a right is agreed upon in the framework contract and that the changes in the interest or exchange rates are based on the reference interest or exchange rates agreed on in accordance with point (3)(b) and (c) of Article 52. The payment service user shall be informed of any change in the interest rate at the earliest opportunity in the same way as provided for in Article 51(1), unless the parties have agreed on a specific frequency or manner in which the information is to be provided or made available. However, changes in interest or exchange rates which are more favourable to the payment service users, may be applied without notice.

3.   Changes in the interest or exchange rate used in payment transactions shall be implemented and calculated in a neutral manner that does not discriminate against payment service users.