(29)The collection of sufficient data for identifying all other currencies than the most relevant Union currencies requires a minimum time period to elapse from the date of authorisation of the CSD-banking service providers until the end of that time period. Therefore, the use of alternative methods to identify all other currencies than the most relevant Union currencies should be allowed for the first year following the authorisation of CSD-banking service providers under the new regulatory framework established by Regulation (EU) No 909/2014 for those CSD-banking service providers that already provide banking-type ancillary services at the date of entry into force of the technical standards referred to in Article 69 of Regulation (EU) No 909/2014. This transitional arrangement should not affect the requirement for CSD-banking service providers to ensure sufficient liquid resources as such, but only the identification of those currencies that are subject to stress testing for the purpose of liquidity management.