Section 378H(1) in The Mumbai Municipal Corporation Act, 1888
(1)Any person aggrieved by a demolition order made under section 378-B or section 378-E may, within twenty-one days after the date of the service of the order, appeal to the Chief Judge of the Small Causes Court (hereinafter in this section referred to as the Chief Judge), and no proceedings shall be taken by the Commissioner to enforce any order in relation to which an appeal is brought before the appeal is finally determined:Provided that no appeal shall lie at the instance of a person who is in occupation of the premises to which the order relates under a lease or agreement of which the expired term does not exceed three years.