18(1)Anything done by the Executive under a superseded enactment, so far as that thing is still in force, subsisting or effective immediately before the appointed day, shall be treated for the purposes of this Act—
(a)as done; and
(b)if properly done under the superseded enactment, as properly done;
by London Regional Transport under the corresponding enactment in this Act.
(2)For the purposes of sub-paragraph (1) above a thing is properly done under an enactment if it is done with any approval or consent required by that enactment for the doing of that thing.
(3)So far as relates to anything done before the appointed day under a superseded enactment, references in this Act to the approval or consent of the Secretary of State shall be read as references to any approval or consent required by the superseded enactment.
(4)In this paragraph, "superseded enactment" means an enactment which—
(a)is repealed by this Act or ceases to apply to London Regional Transport by virtue of any repeal made by this Act; and
(b)is replaced by an enactment in this Act which re-enacts it, with or without modification.