(12)The Commission should be empowered to adopt regulatory technical standards developed by the EBA, with regard to what constitutes an appropriately conservative method for measuring the amount of the undrawn portion of the cash advance facilities in the context of calculating the exposure value of a securitisation and with regard to further specifying the conditions to allow institutions to calculate K IRB for the pool of underlying exposures of a securitisation like in the case of purchased receivables. The Commission should adopt those draft regulatory technical standards by means of delegated acts pursuant to Article 290 TFEU and in accordance with Articles 10 to 14 of Regulation (EU) No 1093/2010.