21For the purposes of the operation in relation to this Act of section 32(1) of the [1950 c. 39.] Public Utilities Street Works Act 1950 (provision as to payments falling to be made under enactments passed before the passing of that Act and instruments made under or confirmed by such enactments), any provision of this Act derived from the [1959 c. 25.] Highways Act 1959 is to be deemed to have been passed on the date of its antecedent enactment.
In this paragraph " antecedent enactment" means the enactment from which the relevant provision of the said Act of 1959 was derived (whether or not modified by the 1959 Act).