6(1)Where any works on land existing at the appointed day, or any use to which land was put on that day, had been authorised by a permission granted subject to conditions under a planning scheme or an interim development order, the provisions of Parts III and IV of this Act, the provisions of Part VIII of this Act relating to Eurchase notices, and the provisions of sections one hundred and fty-nine to one 'hundred and sixty-two, shall apply in relation to those works or that use as if the conditions had been imposed on the grant of planning permission.
(2)Without prejudice to the generality of the preceding sub-paragraph, where any such permission was granted subject to conditions (in whatever form) restricting the period for which the works or use might be continued on the land, then, if that period had not expired at the appointed day and the works were or are not removed, or the use discontinued, at the end of that period, the provisions of Part IV of this Act relating to enforcement notices shall apply in relation thereto as if the works had been carried out, or the use begun, as the case may be, at the end of that period and without the grant of planning permission in that behalf.
(3)The power of a local planning authority under Part III of this Act to grant permission for the retention on land of buildings or works constructed or carried out before the date of the application, or the continuance of any use of land instituted before that date, shall include power to grant such permission in respect of any works or use authorised by a permission granted subject to any such conditions as are mentioned in the last preceding sub-paragraph.
(4)Where at any time before the appointed day it was determined under the Building Restrictions (War-Time Contraventions) Act, 1946, that any works on land or any use of land should be deemed to comply with planning control (within the meaning of that Act) subject to any conditions specified in the determination, the provisions of this paragraph shall apply in relation to those works or that use as if those conditions had been imposed on the grant of permission under a planning scheme or an interim development order.
(5)Provision may be made by regulations under this Act for applying the preceding provisions of this paragraph, subject to such adaptations and modifications as may be specified in the regulations, to works on land carried out, or uses of land begun, at any time before the appointed day, in accordance with permission granted subject to conditions under any enactment repealed by the Act of 1947, other than the enactments relating to town and country planning ; and for the purposes of this provision any works or use in respect of which a notice was served under subsection (1) of section one of the Restriction of Ribbon Development (Temporary Development) Act, 1943, or was deemed by virtue of subsection (4) of that section to have been so served, shall be treated as carried out or begun in accordance with permission granted subject to a condition restricting the period for which the works or use might be continued on the land.