Dematerialisation requirement enables shifting securities from trade-for-trade to normal rolling settlement subject to certification and reporting. Stock exchanges may move securities of companies that have established connectivity with both depositories from Trade for Trade Settlement to Normal Rolling Settlement if a majority of other-than-promoter holdings are in dematerialised form certified by the RTA or, where no RTA exists, by a practicing company secretary or chartered accountant, and if there are no other grounds for continuation of Trade for Trade Settlement; exchanges must report actions in their periodic development reports to the regulator.