24. (1) The Authorised Officer may, by a notice served in the prescribed manner, direct the owner of a building or tank the construction or excavation of which is in progress on the date of commencement of this Ordinance, not to proceed with the work any more and to remove such construction or fill up such excavation 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 as the Authority may think fair and reasonable, remove the same within the period aforesaid. (2) The provisions of sub-section (1) shall not apply to normal repairs to existing buildings.