(1) Where -

(a) a valuation order has been made before the relevant date, and

(b) one or more copy valuation certificates under section 26 of the Principal Act, relating to properties situated in the rating authority area specified in the valuation order, have been issued under that section before that date,

then, on and from the relevant date, the Principal Act shall, in its un-amended form, have effect in relation to -

(i) the copy valuation certificates, and

(ii) the eventual valuation certificates issued under section 24 and the valuation list, published on foot of that order,

but this is subject to subsection (2).

(2) Subsection (1) does not apply to section 24 of the Principal Act which section, as amended by this Act, shall have effect in relation to the matters referred to in that subsection.