Section 354B(2) in The Mumbai Municipal Corporation Act, 1888
(2)It shall be the duty of the corporation to execute, with due diligence, any improvement scheme, street scheme, deferred street scheme, poorer classes accommodation scheme, reclamation scheme, or police accommodation scheme, duly sanctioned in accordance with the provisions of the City of Bombay Improvement Act, 1898, or the City of Bombay Improvement Trust Transfer Act, 1925, before the date on which the City of Bombay Municipal (Amendment) Act, 1933, comes into operation, which remains unexecuted on that date, until the completion of the scheme.Improvement Schemes