In this section and Schedule 2 to this Act, "old mining permission" means any planning permission for development—
which was deemed to be granted under Part III of the Town and Country Planning Act 1947 by virtue of section 77 of that Act (development authorised under interim development orders after 21st July 1943).
An old mining permission shall, if an application under that Schedule to determine the conditions to which the permission is to be subject is finally determined, have effect as from the final determination as if granted on the terms required to be registered.
If no such development has, at any time in the period of two years ending with 1st May 1991, been carried out to any substantial extent anywhere in, on or under the land to which an old mining permission relates, that permission shall not authorise any such development to be carried out at any time after the coming into force of this section unless—
An old mining permission shall—
An old mining permission shall, if—
cease to have effect on the day following the last date on which the application to determine those conditions may be served.
Subject to subsection (3) above, this section—
This section and that Schedule, and the principal Act, shall have effect as if the section and Schedule were included in Part III of that Act.