1. An institution, other than when acting as an originator, a sponsor or original lender, shall be exposed to the credit risk of a securitisation position in its trading book or non-trading book only if the originator, sponsor or original lender has explicitly disclosed to the institution that it will retain, on an ongoing basis, a material net economic interest which, in any event, shall not be less than 5 %.
Only any of the following qualifies as retention of a material net economic interest of not less than 5 %:
(a) retention of no less than 5 % of the nominal value of each of the tranches sold or transferred to the investors;
(b) in the case of securitisations of revolving exposures, retention of the originator's interest of no less than 5 % of the nominal value of the securitised exposures;
(c) retention of randomly selected exposures, equivalent to no less than 5 % of the nominal value of the securitised exposures, where such exposures would otherwise have been securitised i