6. These guidelines apply in relation to the IRB Approach in accordance with Part Three, Title II, Chapter 3 of Regulation (EU) No 575/2013 for all methods based on own estimates of PD and LGD. Where, for exposures other than retail, an institution has received permission to use the IRB Approach but has not received permission to use own estimates of LGD in accordance with Article 143(2) in conjunction with Article 151(8) to (9) of that Regulation, all parts of these guidelines apply, except Chapters 6 and 7. These guidelines do not apply to the calculation of own funds requirements for dilution risk in accordance with Article 157 of Regulation (EU) No 575/2013.