The Secretary of State shall, after consultation with the Council of the Isles of Scilly, by order provide for the application to those Isles of the provisions of this Act specified in Parts I and II of Schedule 21 to this Act as if those Isles were a separate county.
In relation to land in the Isles of Scilly, the provisions of this Act specified in Part III of the said Schedule shall have effect as if those Isles were a county district and the Council of the Isles were the council of that district.
The Secretary of State, may, after consultation with the Council of the Isles of Scilly, by order provide for the application to those Isles of the provisions of this Act specified in Part IV of the said Schedule as if those Isles were a .separate county or county district.
Any order under subsection (1) or (3) of this section may provide for the application of the provisions there mentioned to the Isles subject to such modifications as may be specified in the order.