121 Valuation according to tone of list.E+W
(1)Where for the purposes of section 20 of the 1967 Act a hereditament is valued on the basis of the assumptions specified in subsection (1) of that section (basis of valuation for the purposes of a proposal to alter a valuation list to be consistent with the tone of the list), no account shall be taken of a change to which this subsection applies unless it is one which—
(a)affects the physical state or physical enjoyment of the hereditament, or
(b)affects the physical state of the locality in which the hereditament is situated or, though it does not affect the physical state of the locality, is nonetheless physically manifest there.
(2)Subsection (1) above applies to any change in the state of the hereditament or the state of the locality in which the hereditament is situated which has occurred since the time by reference to which the value of the hereditament is to be ascertained, other than one relating to a factor which is a relevant factor within the meaning of that section.
(3)This section shall have effect in relation to any proposal made on or after 10 March 1988 which is outstanding on the passing of this Act but shall not have effect in relation to any proposal made before 10 March 1988.