Subject to the following provisions of this section, the amount of any grant paid to a local authority in accordance with regulations made under section 250 of this Act—
In respect of land of any of the following descriptions, that is to say—
subsection (1)(a) of this section shall apply (subject to subsection (3) of this section) as if for the words "fifty per cent." there were substituted the words " ninety per cent. ".
Subsection (2) of this section shall not authorise the payment, in the case of any land, of a grant at a higher rate in respect of a year or part of a year which, together with the preceding years or parts of years in respect of which grants at a higher rate have been paid in the case of that land, would extend beyond a total period of eight years.
In this section "war-damage redevelopment" means the redevelopment as a whole of an area of extensive war damage, and includes the relocation of population or industry, or the replacement of open space, in the course of such redevelopment.
In this section references to a grant at a higher rate are references to a grant of an amount which—