Section 45ZE(2) in The Banking Regulation Act, 1949
(2)Where any such locker is hired from a banking company by two or more individuals jointly and under the contract of hire, the locker is to be operated under the joint signatures of two or more of such hirers, such hirers may nominate one or more persons to whom, in the event of the death of such joint hirer or hirers, the banking may give, jointly with the surviving joint hirer or joint hirers, as the case may be, access to the locker and liberty to remove the contents of such locker.