(1) Where the erection or re-erection of any building has been commenced or is being carried on or has been completed without the permission referred to in section 4 or in contravention of any condition subject to which any permission has been granted, the Authority shall issue a notice in writing calling upon the person to show cause within a period of 48 hours, why the building should not be altered or demolished as may be deemed necessary to remove the contravention.
(2) The Authority shall cause the notice to be affixed on the outer door of some conspicuous part of the building whereupon the notice shall be deemed to have been duly served upon the owner or the occupier of the building.
(3) If the person to whom the notice has been given refuses or fails to show cause within a period specified under sub-section (1) or if after hearing that person, the Authority is satisfied that the erection or re-erection of the building is in contravention of the provisions of this section, the Authority shall by order direct the person to demolish, alter or pull down the building or part thereof so far as is necessary to remove the contravention within a period not exceeding five days as may be specified in the order and if the person fails to comply with the direction, the Authority may itself cause the erection or re-erection to be demolished after the expiry of the said period and may for that purpose use such Police Force as may be necessary which shall be made available to him by the Police Department on requisition.
(4) All expenses incurred for such demolition shall be recoverable from the owner and/or the occupier in the same manner as arrears of land revenue.