(1) Section 97 of the Principal Act is amended by substituting the following for subsection (2J):

"(2J)

(a) Notwithstanding subsection (2), but subject to the other provisions of this section (including paragraphs (b) and (c) of this subsection), the deduction authorised by subsection (2)(e) shall not exceed -

(i) 75 per cent of the deduction that would, but for this subsection, be authorised by subsection (2)(e) in respect of interest accrued on or after 7 April 2009 up to and including 31 December 2016,

(ii) 80 per cent of the deduction that would, but for this subsection, be authorised by subsection (2)(e) in respect of interest accrued on or after 1 January 2017 up to and including 31 December 2017,

(iii) 85 per cent of the deduction that would, but for this subsection, be authorised by subsection (2)(e) in respect of interest accrued on or after 1 January 2018 up to and including 31 December 2018,

(iv) 90 per cent of the deduction that would, but for this subsection, be authorised by subsection (2)(e) in respect of interest accrued on or after 1 January 2019 up to and including 31 December 2019, and

(v) 95 per cent of the deduction that would, but for this subsection, be authorised by subsection (2)(e) in respect of interest accrued on or after 1 January 2020 up to and including 31 December 2020,