After coming into operation of the development plan, no person shall change the use of any land or carry out any development of land without the permission in writing of the Director :
30 THE HIMACHAL PRADESH TOWN AND COUNTRY PLANNING ACT, 1977
Provided that no such permission shall be necessary-
(a) for carrying out 'works for the maintenance, repair or alterationof any building which does not materially alter the external appearance of the buildings ;
(b) for carrying out work for the improvement or maintenance of a high-way, road or public street by the Union or State Government or an authority established under this Act or by a local authority having jurisdiction, provided that such maintenance or improvement does not change the road alignment contrary to the provisions of the development plan;
(c) for the purpose of inspecting, repairing or renewing any drain, sewers, mains, pipes, cables, telephone or other apparatus including the breaking open of any street or other land for that purpose;
(d) for the excavation or soil shaping in the interest of agriculture;
(e) for restoration of land to its normal use where land has been usedtemporarily for any other purposes;
(f) for use for any purpose incidental to the use of building for humanhabitation, or any other building or land attached to such buildings;
(g) for the construction of a road intended to give access to land solelyfor agricultural purposes.