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Subject to subsection (3) of this section, any sum recovered by the Secretary of State under F2section 156A of this Act shall be paid to the. . . F3 planning authority who paid the compensation to which that sum relates.

In paying any such sum to the. . . F3 planning authority, the Secretary of State shall deduct therefrom—

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• F4. . .the amount of any grant paid by him under Part XIII of this Act in respect of that compensation;

• Provided that, if the sum recovered by the Secretary of State is an instalment of the total sum recoverable, or is recovered by reference to development of part of the land in respect of which the compensation was payable, any deduction to be made under F4. . . paragraph (b) of this subsection shall be a deduction of such amount as the Secretary of State may determine to be the proper proportion of the amount referred to in that paragraph.

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