9. (1) Where an order for the demolition of a building under section 8 has been made and it is not vacated or demolished within the time allowed for that purpose, the Competent Authority or any person authorized by it in this behalf, may cause to be vacated and demolished. The Competent Authority may for the purpose of vacation and demolition use such force as may be necessary.
(2) The Competent Authority may sell by public auction the materials of a building demolished under sub-section (1) and the expenses incurred in demolishing the building shall be deemed to have been reimbursed in full from the sale proceeds thereof ;
Provided that if the owner of the building desires to remove the materials or any portion thereof before the auction, he may remove the same after payment to the Competent Authority within the period fixed by it, of the entire expenses incurred in the demolition of the building.