(1)There shall be exempt from control under this Act any work done in the construction or alteration of a building or of any works in a locality which is specified by the Board of Trade as being a development district for the purposes of the [1960 c. 18.] Local Employment Act 1960 at the time when the work is carried out.
(2)Where a locality has ceased to be so specified, there shall be exempt from control under this Act any work done in the construction or alteration of a building, or of any works, in that locality if—
(a)the construction or alteration was begun before the date on which the locality ceased to be so specified; or
(b)a contract for the work in question, or for other work in the construction or alteration, was made before that date.
(3)Work shall not be exempt from control by virtue of paragraph (a) of subsection (2) of this section if the construction or alteration has been interrupted for a continuous period of twelve months or more.
(4)Nothing in subsection (2) of this section shall be taken as conferring any exemption on work in respect of a building or any works by reason only that the construction of any ancillary works for the building or works in question was begun, or that a contract for work in the construction of such ancillary works was made, before the date mentioned in that subsection; but where work done in the construction or alteration of a building or of any works is exempt from control by virtue of that subsection there shall also be exempt from control by virtue of that subsection any work done in the construction of any ancillary works required for that building or those works.
(5)In this section "specified by the Board of Trade " means specified in the Board of Trade Journal by a notice which has not at the material time been withdrawn by a further notice in that Journal.