(24)To ensure that payment service providers who rely on the dedicated interface can continue to provide their services in case of problems of availability or inadequate performance, it is necessary to provide, subject to strict conditions, a fallback mechanism that will allow such providers to use the interface that the account servicing payment service provider maintains for the identification of, and communication with, its own payment service users. Certain account servicing payment service providers will be exempted from having to provide such a fallback mechanism through their customer facing interfaces where their competent authorities establish that the dedicated interfaces comply with specific conditions that ensure unhampered competition. In the event that the exempted dedicated interfaces fail to comply with the required conditions, the granted exemptions shall be revoked by the relevant competent authorities.