1. An institution applying to use the IRB Approach shall have been using for the IRB exposure classes in question rating systems that were broadly in line with the requirements set out in Section 6 for internal risk measurement and management purposes for at least three years prior to its qualification to use the IRB Approach.
2. An institution applying for the use of own estimates of LGDs and conversion factors shall demonstrate to the satisfaction of the competent authorities that it has been estimating and employing own estimates of LGDs and conversion factors in a manner that is broadly consistent with the requirements for use of own estimates of those parameters set out in Section 6 for at least three years prior to qualification to use own estimates of LGDs and conversion factors.
3. Where the institution extends the use of the IRB Approach subsequent to its initial permission, the experience of the institution shall be sufficient to satisfy the requirements of paragraphs 1 and 2
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