Dematerialization requirement: companies with dual depository connectivity may shift from trade-for-trade to rolling settlement subject to conditions. Companies with connectivity to both depositories may be shifted from Trade-for-Trade Settlement to normal Rolling Settlement if at least 50% of non-promoter holdings are dematerialized, evidenced by a certificate from the Registrar and Transfer Agent or, if no RTA exists, from a practicing Company Secretary or Chartered Accountant, and provided there are no other grounds for continuation of TFTS; stock exchanges must report actions in their Monthly/Quarterly Development Reports.