In relation to development consisting of the construction of a scheduled work, it is a condition of the deemed planning permission under section 17(1) that the development must be begun not later than the end of 10 years beginning with the day on which this Act is passed.

The Secretary of State may, in relation to any such development, by regulations extend the period within which the development must be begun by virtue of this section.

Regulations under subsection (2) must be made by statutory instrument; and a statutory instrument containing such regulations is subject to annulment in pursuance of a resolution of either House of Parliament.

Section 91 of TCPA 1990 (limit on duration of planning permission) does not apply to deemed planning permission under section 17(1).