531. Before 15 September 1980, a real estate assessment roll or a roll of rental values contemplated in section 530 must be amended in conformity with Chapter XV to take account of the provisions of this act that are applicable to it and that differ from those of the Real Estate Assessment Act.
For the purposes of this section, the word “unduly” in section 174 shall be construed as if the roll were required to have been made in conformity with this act on 21 December 1979.
An amendment made under this section cannot have effect to a time prior to 1 January 1980.