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(1)Subject to the provisions of this Part of this Act, a person shall be entitled to compensation under this Part of this Act in respect of a planning decision such as is mentioned in subsection (1) of section sixteen of this Act if at the time of that decision he is entitled to an interest in any land to which the decision relates which has an unexpended balance of established development value, and the value of that interest, or, in the case of an interest extending to other land, the value of that interest in so far as it subsists in that land, is depreciated by the decision.
(2)Where an interest in land has (whether before or after the commencement of this Act) been compulsorily acquired by, or sold to, a public authority possessing compulsory purchase powers (not being statutory undertakers or the National Coal Board), that authority, and any person deriving title from that authority under a disposition made by that authority on or at any time after the first day of July, nineteen hundred and forty-eight, shall not be entitled to compensation under this Part of this Act in respect of a planning decision made after the service of the notice to treat, or after the making of the contract of sale, as the case may foe, by reason that the value of that interest, or of any interest created (whether immediately or derivatively) out of that interest, is depreciated by that decision.
(3)The last preceding subsection shall apply to land which has at any time on or after the first day of July, nineteen hundred and forty-eight (whether before or after the commencement of this Act) been appropriated by a local authority for a purpose for which the authority could have been authorised to acquire the land compulsorily as it applies to land in which an interest has been acquired as mentioned in that subsection, with the substitution for the reference to the service of the notice to treat of a reference to the appropriation.
(4)Where any land is at the date of commencement of this Act, or at any date thereafter becomes, operational land of any statutory undertakers or land of the National Coal Board of a class specified in regulations made under section ninety of the principal Act, the statutory undertakers or, as the case may be, the National Coal Board, and any person deriving title from those undertakers or that Board, shall not be entitled to compensation under this Part of this Act in respect of a planning decision made after the relevant date aforesaid by reason that the value of any interest in that land is depreciated by that decision.
(5)A person shall not be entitled to compensation under this Part of this Act in respect of depreciation of the value of an interest in land by a planning decision if he is entitled to compensation under subsection (3) of section twenty-two of the principal Act (which relates to planning decisions following upon the withdrawal of permission granted by a development order) in respect of depreciation of the value of that interest by that decision.