Article 254 4.

By way of derogation from paragraph 1, competent authorities may prohibit institutions, on a case by case basis, from applying the SEC-SA when the risk-weighted exposure amount resulting from the application of the SEC-SA is not commensurate to the risks posed to the institution or to financial stability, including but not limited to the credit risk embedded in the exposures underlying the securitisation. In the case of exposures not qualifying as positions in an STS securitisation, particular regard shall be had to securitisations with highly complex and risky features.