Section 91B(2) in The Mumbai Municipal Corporation Act, 1888
(2)[ Notwithstanding anything contained in sub-section (1) or sub-section (4) of section 91A, it shall be lawful for the State Government to lease afresh, to the Mumbai Municipal Corporation for the purposes specified in section 91C, any land specified in Schedule W, for a term not exceeding thirty years and thereupon the land shall revest in the Corporation. On such revesting of the land, the provisions of sub-section (1) shall not apply to the said land so long as such lease remains in force and is not determined or is not surrendered or otherwise terminated in accordance with law.