(8)In order to ensure the ongoing maintenance of the net economic interest, institutions should ensure that there is not any embedded mechanism in the securitisation structure by which the minimum retention requirement at origination would necessarily decline faster than the interest transferred. Similarly, the retained interest should not be prioritised in terms of cash flows to preferentially benefit from being repaid or amortised such that it would fall below 5 % of the ongoing nominal value of the tranches sold or exposures securitised. Moreover, the credit support provided to the institution assuming exposure to a securitisation position should not decline disproportionately relative to the rate of repayment on the underlying exposures.