Dematerialisation requirement enables eligible companies with depository connectivity to shift from trade-for-trade to rolling settlement. Companies with connectivity to both depositories may be moved from Trade for Trade Settlement to Rolling Settlement if at least half of other-than-promoter holdings are dematerialised and certified by the Registrar and Transfer Agent, or by a practicing Company Secretary/Chartered Accountant where no RTA exists, and provided no other grounds justify continuation of TFTS; stock exchanges must report actions taken in Monthly/Quarterly Development Reports.