(10)With regard to the legitimate expectations of supervised credit institutions, the ECB acknowledges the need to allow for transitional periods where its exercise of options and discretions significantly departs from the approach taken by the national competent authorities prior to the entry into force of this Regulation. In particular, where the ECB exercises its options and discretions in relation to transitional provisions laid down in Regulation (EU) No 575/2013, this Regulation should establish appropriate transitional periods.