Section 29B(2)(b) in The West Bengal Premises Tenancy Act, 1956.
(b)where the landlord is the parent or the wife of such member of the naval, military or air force of the Union of India as aforesaid, a certificate by the Area or Sub-Area Commander within whose jurisdiction the premises are situated that he or she is the parent or the wife, as the case may be, of such member of the naval, military or air force of the Union of India and that he or she requires the premises for his or her own occupation and for the occupation of his or her family after the retirement of such member, or