(1)Section 38(1) of the Act of 1959 (land affected by planning proposals and qualifying for protection under Part IV of that Act) shall have effect as if the land specified therein included land which—
(a)is land indicated in a structure plan in force either as land which may be required for the purposes of any functions of a government department, local authority or statutory undertakers, or of the National Coal Board, or as land which may be included in an action area; or
(b)is land allocated for the purposes of any such functions by a local plan in force, or is land defined in such a plan as the site of proposed development for the purposes of any such functions; or
(c)is land in respect of which a compulsory purchase order is in force, where the appropriate authority have power to serve, but have not served, notice to treat in respect of the land ; or
(d)is land on which the Secretary of State proposes to provide a trunk road or a special road and has given to the local planning authority written notice of his intention to provide the road, together with maps or plans sufficient to identify the proposed route of the road.
(2)Subsection (1)(a) above shall not apply to land situated in an area for which a local plan is in force, where that plan—
(a)allocates any land in the area for the purposes of such functions as are mentioned in that paragraph; or
(b)defines any land in the area as the site of proposed development for the purposes of any such functions.
(3)In section 38(2) of the Act of 1959 (notice requiring purchase of claimant's interest on ground of planning blight), and for the purposes of that subsection as applied by section 38(3) of that Act, " the relevant date "—
(a)in relation to land mentioned in subsection (1)(c) above, means the date when the order for its compulsory purchase was confirmed or made by the Secretary of State; and
(b)in relation to land mentioned in subsection (1)(d) above means the date on which the Secretary of State gave to the local planning authority the written notice specified in that paragraph.
(4)Paragraphs (a) and (b) of subsection (1) above shall have effect instead of paragraphs (a) and (b) of the said section 38(1).