It is evident from the said provision that any document containing contracts to transfer for consideration, any immoveable property for deriving the benefit under Section 53A of the Transfer of Property Act must be registered if it has been executed after the commencement of the Amending Act of 2001 and in case such document is not registered on or after such commencement it will have no effect for the purpose of invoking the doctrine of part performance under Section 53A. The doctrine of part performance protecs the right of a transferee of an agreement for sale if he has been put in possession or continues in possession in part performance of the contract or has done some act in furtherance of the contract. Prior to the amending Act of 2001 a party could claim the benefit of such possession on the basis of the doctrine of part performance even if the agreement for sale was not registered but the same has now been specifically debarred by the amending Act. That being the position, it is not