In the first instance and to remove any form of mechanistic reliance on external ratings, an institution should use its own calculation of regulatory capital requirements where the institution has permission to apply the Internal Ratings Based Approach (the ‘IRB Approach’) in relation to exposures of the same type as those underlying the securitisation and is able to calculate regulatory capital requirements in relation to the underlying exposures as if these had not been securitised (‘KIRB’), in each case subject to certain pre-defined inputs (the Securitisation IRB Approach — ‘SEC-IRBA’).
Ar an gcéad dul síos, agus chun nach mbeifí ag brath go meicníoch ar rátálacha seachtracha, ba cheart do gach institiúid tarraingt ar an ríomh atá déanta aici féin ar na ceanglais caipitil rialála i gcás ina bhfuil cead aici an Cur Chuige Bunaithe ar Rátálacha Inmheánacha (an “Cur Chuige IRB”) a úsáid maidir le risíochtaí ar den chineál céanna iad agus risíochtaí foluiteacha an urrúsaithe, agus i gcás ina bhfuil sé ar a cumas ceanglais caipitil rialála a bhaineann leis na risíochtaí foluiteacha, amhail is nár urrúsaíodh iad (“Kirb”), a ríomh, agus iad faoi réir ionchuir réamh-shainithe (Cur Chuige Urrúsaithe IRB —‘SEC-IRBA’) i ngach cás.