Subject to the provisions of this section, every planning permission granted or deemed to be granted 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—
The period mentioned in subsection (1)(b) shall be a period which the authority consider appropriate having regard to the provisions of the development plan and to any other material considerations.
If planning permission is granted without the condition required by subsection (1), it shall (subject to subsections (3ZA) and (3ZB)) 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 the applicable period, beginning with the date of the grant.
Subsection (3ZB) applies if—
The section 73 permission 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 date on or before which the previous permission required development to be begun.
The previous permission, in relation to a section 73 permission, is the previous planning permission referred to in section 73(1).
References in subsections (3ZA) to (3ZC) to a section 73 permission are to a planning permission granted under section 73.
In subsections (3B) to (3BB)—
"implementation period" means the period before the end of which a development to which a planning permission relates must be begun (see subsections (1) and (3));
"relevant proceedings" means proceedings to challenge the validity, in respect of the development of land in England, of a grant of planning permission or of a deemed grant of planning permission.
If a person is given permission by a court to bring relevant proceedings, the implementation period is extended by one year.
If a party to relevant proceedings is given permission to appeal to the Court of Appeal against a decision determining the challenge, the implementation period is extended by one year.
If a party to relevant proceedings is given permission to appeal to the Supreme Court against a decision determining the challenge, the implementation period is extended by two years.
Any extension of a period under subsection (3B), (3BA) or (3BB) is to run concurrently with any other extension of the period under the same subsection (so far as they overlap).
Any extension of a period under subsection (3BA) is to run consecutively to the previous extension of the period under subsection (3B) (if they would otherwise overlap).
Any extension of a period under subsection (3BB) is to run consecutively to the previous extension of the period under subsection (3B) and any previous extension of the period under subsection (3BA) (if they would otherwise overlap).
The references in subsections (3BA) and (3BB) to determining a challenge are to determining it after a full hearing (and accordingly do not include a refusal of permission or leave).
Nothing in this section prevents the development being begun from the time the permission is granted or deemed to be granted.
Nothing in this section applies—
The applicable period—