Section 527(1) in The Calcutta Municipal Corporation Act, 1980
(1)Where the Municipal Commissioner upon any information in his possession is satisfied that any building is unfit for human habitation and is not capable at a reasonable expense of being rendered fit, he shall serve upon the owner of the building and upon any other person having an interest in the building whether as a lessee, mortgagee or otherwise, a notice to show cause within such time as may be specified in the notice as to why an order of demolition of the building should not be made.
