Section 23(3)(b) in THE UTTAR PRADESH AVAS EVAM VIKAS PARISHAD ADHINIYAM, 1965
(b)if the Board fails to acquire or to institute, proceedings for the acquisition of any property situate within the defined alignments of the street, the owner of such property may at any time, within the time-limit for the execution of the scheme, or within three years thereafter, give the Board notice requiring it to acquire or to institute proceeding for the acquisition of such property before the expiration of six months from the date of such notice, and hereupon the Board shall acquire by agreement, or institute such proceedings by notice under clause (c) and acquire, the property accordingly; and if the Board fails to do so, it shall pay such compensation as may be determined in accordance with the provisions of this Act and the rules;