5. (1) The Authorised Officer may, by a notice served in the prescribed manner, direct the owner of a building or tank or hill, the construction or excavation or cutting whereof is in progress on the date of the commencement of this Act, not to proceed with the work any more and to remove such building within the period mentioned in the notice or within such further period as may be extended by the Authorised Officer; and the owner thereof shall, on payment to him of such compensation, not exceeding the sum of two hundred and fifty rupees, as the Authorised Officer thinks fair and reasonable, remove the same within the period aforesaid. (2) The provision of sub-section (1) shall not apply to normal repairs to existing buildings.