(1)For the purposes of a compulsory acquisition to which this Part of this Act applies, subsection (4) of section forty-eight of the principal Act shall not apply to any planning permission granted—
(a)for any development of land of a class specified in the Sixth Schedule to this Act, or
(b)for any development specified in a certificate issued under section seventy-seven of the principal Act (which relates to land ripe for development before the first day of July, nineteen hundred and forty-eight),
or to any planning permission deemed to be granted by virtue of section seventy-five of the principal Act (which relates to unfinished buildings).
(2)Paragraph (b) of subsection (4) of the said section forty-eight (which provides certain exceptions from that subsection by reference to exemptions from development charges), and so much of subsection (1) of section three of the Act of 1953 as relates to the exceptions comprised in that paragraph, shall not apply for the purposes of any compulsory acquisition to which this Part of this Act applies.