Article 236 1d.

Notwithstanding paragraph 1c of this Article, institutions that apply the IRB Approach to guaranteed exposures using the method provided for in Article 153(5) shall calculate the risk weight and expected loss applicable to the covered part of the exposure using the PD, the LGD applicable for a comparable direct exposure to the protection provider as referred to in Article 161(1), in accordance with paragraph 1b of this Article, and the same risk weight function as the ones used for a comparable direct exposure to the protection provider, and shall, where applicable, use the maturity (M) related to the underlying exposure, calculated in accordance with Article 162. For subordinated exposures and non-subordinated unfunded credit protection, the LGD to be applied by institutions to the covered part of the exposure value shall be the LGD associated with senior claims and the institutions may account for any funded credit protection securing the unfunded credit protection in accordance with this Chapter.