Where a person is entitled to compensation under this Part of this Act in respect of depreciation by a planning decision of the value of an interest in land, the amount of the compensation, subject to the following provisions of this section, shall be whichever is the lesser of the following amounts, that is to say—
Land to which this section applies, in relation to a planning decision, is land which—
If, in the case of any land to which this section applies, compensation is payable under this Part of this Act in respect of two or more interests in that land by reason of the same planning decision, and the aggregate amount of compensation payable apart from this subsection in respect of those interests would exceed the amount mentioned in paragraph (b) of subsection (1) of this section, the amount mentioned in that paragraph shall be allocated between those interests in proportion to the depreciation of the value of each of them respectively, and the amount of the compensation payable in respect of any of those interests shall be the sum so allocated to that interest.
Where the land constituting the decision area, taken as a whole, does not satisfy both of the following conditions, that is to say—
the provisions of subsection (5) of this section shall have effect for the purpose of assessing the compensation payable under this Part of this Act in respect of any interest subsisting in that land or any part thereof.
Where this subsection applies in relation to an interest in land—
and the amount of the compensation shall be the aggregate of the amounts which would be payable by virtue of the preceding provisions of this section if the planning decision had been made separately with respect to each of those parts.
In this section " the decision area " in relation to a planning decision means the aggregate of the land to which the decision relates.