9.—(1) Where, subsequent to 1st April 2002, the rateable value of lands and heritages to which this Part applies is increased with effect from a day in the relevant year (the “effective day”) the ARP shall not be payable but shall, as regards days in that year on and after that effective day, be calculated in accordance with the formula–
where–
ARP has the same meaning as in regulation 7 above;
IRV is the increased rateable value of those lands and heritages;
RV is their rateable value immediately prior to the effective day; and
PF is the poundage figure, being–
0.458, where the increased rateable value of the lands and heritages is £10,000 or less; and
0.478, in any other case.
(2) Where the rateable value of lands and heritages to which this Part applies is reduced with effect from a day in the relevant year subsequent to 1st April 2002, as a result of–
(a)a material change of circumstances (within the meaning of section 37(1) of the 1975 Act(1)); or
(b)the assessor amending or adding an apportionment note under paragraph 2 of Schedule 5 to the 1992 Act,
the ARP shall not be payable but shall, as regards days in that year on and after that effective day, be calculated in accordance with the formula–
where–
ARP and RV have the same meanings as in paragraph (1) above; and
RRV is the reduced rateable value of those lands and heritages.
The relevant definition in section 37(1) was amended by the Rating and Valuation (Amendment) (Scotland) Act 1984 (c. 31), section 20 and Schedule 2, paragraph 17, by the Abolition of Domestic Rates Etc. (Scotland) Act 1987 (c. 47), Schedule 6, and by the 1994 Act, Schedule 13, paragraph 100(8).