Act not to apply to works which affect only the interior of the building and does not materially affect its internal

Nothing in this Act shall apply to- (a) the carrying out of work to the maintenance, improvement or other alteration of any building being works which affect only the interior of the building or which do not materially affect the external appearance of the building: (b) the carrying out by any local authority or body corporate or by any department of Government of any work for the purpose of inspecting, repairing or renewing any drains, sewers main pipes, cables or other apparatus including the breaking open of any street or other land for that purposes; (c) the erection of a place of worship or a tomb or cenotaph or of a wall enclosing a graveyard, place of worship, cenotaph or samasor on land which at commencement of this Act is lawfully occupied.