Where any building acquired under this Chapter which is vested in the Authority is proposed to be demolished, it shall be the duty of the Authority, before evicting the occupiers, to allot such alternative accommodation, at such place and of such nature and size, as the Authority may determine, only to those persons who are occupiers of residential premises in the building, either as owner or tenant, and who are actually residing in the building at the time of their eviction. If any occupier fails to accept and occupy the alternative accommodation allotted to him within 45 days from the date of allotment, the responsibility of the Authority to provide him with such accommodation shall cease. The decision of the Authority as regards any matter contained in this section shall be final and shall not be questioned in any court.
"Explanation".- In this section "building" means a house or a tenement or tenements let or intended to be let or occupied separately, but does not include any building which is unauthorised or which is a temporary building as defined in clause ("sb") of section 3 of [the Mumbai Municipal Corporation Act (Bom. III of 1888)], with this modification that the expression "Commissioner" in that clause shall include an officer or authority which is competent to allow a temporary building to be built within his or its jurisdiction.