A credit rating agency shall use credit rating methodologies shall that are designed and implemented in a way that enables them to:

(a) continue to be used unless there is an objective reason for the credit rating methodology to change or be discontinued;

(b) be capable of promptly incorporating any finding from ongoing monitoring or a review, in particular where changes in structural macroeconomic or financial market conditions would be capable of affecting credit ratings produced by that methodology;

(c) compare credit ratings across different asset classes.