For the purpose of calculating risk-weighted exposure amounts for the underlying exposures, the originator institution of a synthetic securitisation shall use the calculation methodologies set out in this Section where applicable instead of those set out in Chapter 2. For institutions calculating risk-weighted exposure amounts and, where relevant, expected loss amounts with respect to the underlying exposures under Chapter 3, the expected loss amount in respect of such exposures shall be zero.

The requirements set out in paragraph 1 of this Article shall apply to the entire pool of exposures backing the securitisation. Subject to Article 252, the originator institution shall calculate risk-weighted exposure amounts with respect to all tranches in the securitisation in accordance with this Section, including the positions in relation to which the institution is able to recognise credit risk mitigation in accordance with Article 249. The risk weight to be applied to positions which benefit from credit risk mitigation may be amended in accordance with Chapter 4.