(21)In all cases, the competent authorities should assess whether the institution has adopted sufficient margin of conservatism in their estimates of risk parameters. This margin of conservatism should take into account any identified deficiencies in data or methods used in the risk quantification and increased uncertainty that might result for example from the changes in the lending or recovery policies. Where an institution ceases to comply with the requirements for the IRB Approach, the competent authorities should verify whether it fulfils the requirement that the rating systems are corrected in a timely manner. The application of the margin of conservatism should not be used as an alternative to correcting the models and ensuring their full compliance with the requirements of Regulation (EU) No 575/2013.