613.Section 405 provides that a Minister of the Crown may, by order, make such amendments, repeals or revocations to primary and subordinate legislation as appear to him to be appropriate in consequence of this Act or any regulations and orders made under this Act.  The section enables an order to amend, repeal or revoke any such legislation (including this Act and any regulations or orders made under it) made before the 'relevant day', which is defined as the earliest day on which the Authority and all of the functional bodies are in being, and London Regional Transport and the Receiver for the Metropolitan Police District have ceased to exist.
Commentary on Sections Part Xii: Supplementary Provisions Section 405:  Power to amend Acts and subordinate legislation