Section 23(3)(c) in The U.P. Avas Evam Vikas Parishad Adhiniyam, 1965
(c)the Board shall, before proceeding to acquire any property lying within the defined alignments of the street, give (i) in respect of any property regarding which it has received a notice under clause (b), fifteen days' notice; and (ii) in respect of other property, six months' notice to the owner of its intention to acquire such property;