Article 259 2.

If the underlying IRB pool comprises both retail and non-retail exposures, the pool shall be divided into one retail and one non-retail subpool and, for each subpool, a separate p-parameter (and the corresponding input parameters N, KIRB and LGD) shall be estimated. Subsequently, a weighted average p-parameter for the transaction shall be calculated on the basis of the p-parameters of each subpool and the nominal size of the exposures in each subpool.