Act not to apply for certain development works.

Nothing in this Act shall apply to— (a) the carrying out of works for the maintenance, improvement or other alteration of any building being works which affect only the interior of the building for which do not materially affect the external appearance of the building; (b) the carrying out by any local authority or by any department of the Government, of any works for the purposes of inspecting, repairing or renewing any drains, sewers, mains, pipes, cables, or other apparatus including the breaking open of any street or other land for that purpose; (c) the excavations (including wells) made in the ordinary course of agricultural operations; and (d) the construction of unmetalled road intended to give access to land solely for agricultural purposes.