As from the date when a highway becomes a trunk road, any functions of construction, maintenance or improvement exercisable as respects that highway by a council under a local or private Act are to be deemed to have become exercisable by the Minister alone or a strategic highways company alone, whichever is highway authority for the trunk road ("the trunk road authority"), and while the highway remains a trunk road they shall continue to be so exercisable.
Where the Minister is satisfied that there has been conferred on a council by a local or private Act a function substantially similar to one conferred by a provision of this Act specified in Schedule 3 to this Act, he may, after consultation with the council, by order direct that, in relation to a trunk road, the function conferred by the local or private Act is to be exercisable in accordance with the following conditions:
Where the Minister makes an order under this section in relation to a function conferred by a provision of a local or private Act, and the provision of this Act by which a function substantially similar to the first-mentioned function is conferred is, in relation to a trunk road, subject to any modification, the provision of the local or private Act shall, in relation to a trunk road, be subject to a similar modification, and the Minister may by the same order specify the modification to which the provision of the local or private Act is accordingly to be subject.