Section 11(1)(a) in National Housing Bank (Issue And Management Of Bonds) Regulations, 1989
(a)If only a portion of the bond has been lost, stolen, destroyed, mutilated or defaced, and if a portion thereof sufficient for its identification has been produced, to pay interest and to issue to the applicant, on execution of an indemnity bond such as is hereinafter mentioned a duplicate bond in place of that of which a portion has been so lost, stolen, destroyed, mutilated or defaced either immediately after the publication of the list under regulation 13 or on the expiry of such period as the prescribed officer may consider necessary from the date of the publication of the said list;