Dematerialisation requirement enables shift from trade-for-trade to rolling settlement when sufficient public holdings are dematerialised. Stock exchanges may shift securities from Trade-for-Trade Settlement to normal Rolling Settlement for companies that have established connectivity with both depositories provided that at least 50% of non-promoter holdings are in dematerialised form, certified by the RTA or, where no separate RTA exists, by a practicing company secretary or chartered accountant, and provided there are no other grounds for continuation of TFTS; exchanges must report actions in Monthly/Quarterly Development Reports to the regulator.