The outlined provisions stipulate that institutions seeking to employ the Internal Ratings-Based (IRB) Approach must demonstrate at least three years of compliant internal risk measurement practices. This requirement ensures the integrity of risk assessments relative to exposure classes.

Additionally, those wishing to use their own estimates for Loss Given Default (LGD) and conversion factors must similarly substantiate their methodologies over the same period. For institutions expanding their IRB Approach, distinct requirements apply for new exposure classes, necessitating separate validations to confirm adequate experience and compliance standards specific to those exposures.