Commentary on provisions of the Act Planning Section 21: Time limit on deemed planning permission
Subsection (1) provides that, for scheduled works, the deemed planning permission granted by section 20 applies only to works begun no later than ten years after Royal Assent to this Act.
	Subsections (2) and (3) allow the Secretary of State to extend this time limit by statutory instrument, which will be subject to the negative resolution procedure. Subsection (4) disapplies section 91 of the Town and Country Act 1990, which sets out the time limit for "normal" planning permissions.