(1)Compensation under this Part of this Act shall not be payable in respect of a planning decision whereby permission is refused for the development of land if, notwithstanding that refusal, there is available with respect to that land planning permission for development to which this section applies:
Provided that, where such permission is available with respect to part only of the land, this section shall have effect only in so far as the interest subsists in that part.
(2)Where a claim for compensation under this Part of this Act is made in respect of an interest in any land, planning permission for development to which this section applies shall be taken for the purposes of this section to be available with respect to that land or a part thereof if, immediately before the Secretary of State gives notice of his findings in respect of that claim, there is in force with respect to that land, or that part thereof, a grant of, or an undertaking by the Secretary of State to grant, planning permission for some such development, subject to no conditions other than such as are mentioned in section 147(2) of this Act.
(3)This section applies to any development of a residential, commercial or industrial character, being development which consists wholly or mainly of the construction of houses, flats, shop or office premises, or industrial buildings (including warehouses), or any combination thereof.