175.1.5. Where an amount of interest payable on a debt obligation, determined without reference to section 175.1.2, by a borrower in respect of a particular period or part thereof that is after 31 December 1991 can reasonably be regarded as an amount payable as consideration for a reduction in the amount of interest that would otherwise be payable on the debt obligation in respect of a subsequent period, or a reduction in the amount that was or may be paid before the beginning of a subsequent period in satisfaction of the obligation to pay interest on the debt obligation in respect of that subsequent period, such reductions being determined without reference to the existence of, or the amount of any interest paid or payable on, any other debt obligation, that amount,(a) for the purposes of subparagraph 1 of subparagraph ii of paragraph a of section 175.1.2, subparagraph i of paragraph b of that section, subparagraph b of the second paragraph of section 175.1.3 and section 175.1.6, is deemed to be an amount of interest payable on the debt obligation by the borrower in respect of the subsequent period and not to be an amount of interest payable on the debt obligation by the borrower in respect of the particular period; and
(b) when paid, is deemed for the purposes of subparagraph i of paragraph a of section 175.1.2 and subparagraph a of the second paragraph of section 175.1.3 to be an amount paid in satisfaction of the obligation to pay interest on the debt obligation in respect of the subsequent period.