17Increases in statutory deduction from gross value: alteration of valuation lists
If, on or before 31st December 1973, a draft of an order is laid before Parliament under subsection (5) of section 19 of the principal Act increasing the amount which, in accordance with subsection (2) of that section, is to be deducted from the gross value of a hereditament of a class specified in the order for the purpose of ascertaining the net annual value of that hereditament and an order is made in terms of the draft so laid,—
(a)the valuation officer shall, by directions to the rating authority, cause to be made in a valuation list any alterations necessary to give effect to the increased deductions, and the rating authority shall give effect to any such directions accordingly; and
(b)any alteration made in a valuation list by virtue of paragraph (a) above shall have effect as from 1st April 1974, but without prejudice to any subsequent alteration of the valuation list made by virtue of any provision of the principal Act.