and others, 1997(1) Civil Court Cases 0458, judgment of this Court in the case of Gurbachan Singh versus Raghubir Singh, 2010(3) Civil Court Cases 731 (P & H) and judgment of Hon'ble Supreme Court in the case of K. B. Saha and sons Private Ltd. Versus Development Consultant Limited, (2008) 8 Supreme Court Cases 564. I have carefully considered this contention, but the same cannot be accepted. Sub-Section (1A) of Section 17 of the Registration Act, requiring compulsory registration of an agreement whereby possession is also transferred, came into force with effect from 24.09.2001 whereas the impugned agreement is dated 10.04.2001. The said provision was thus not in existence, when the impugned agreement was entered into and, therefore, the impugned agreement did not require compulsory registration. In addition to it, even as per Section 17(1A) of the Registration Act, if an agreement whereby possession is delivered is unregistered, it cannot be used as defence for the purpose of Section 53-A of the Transfer of Property Act. However, Section 17(1A) of the Registration Act does not make such an unregistered agreement completely invalid. Such an unregistered agreement can certainly be the basis of suit for specific performance of such agreement and at best same cannot be used as defence for the purpose of Section 53-A of the Transfer of Property Act. Judgments cited by counsel for the appellants are not applicable to the instant case.