Subject to the provisions of this section, every planning permission granted or deemed to have been granted before the commencement of this section shall, if the development to which it relates has not been begun before the beginning of 1968, be deemed to have been granted subject to a condition that the development must be begun not later than the expiration of five years beginning with the said commencement.
Subject to the provisions of this section, every planning permission granted or deemed to be granted after the commencement of this section shall be granted or, as the case may be, be deemed to be granted, subject to the condition that the development to which it relates must be begun not later than the expiration of—
If after the commencement of this section planning permission is granted without the condition required by subsection (2) above, it shall be deemed to have been granted subject to the condition that the development to which it relates must be begun not later than the expiration of five years beginning with the date of the grant.
Nothing in this section applies—