Shifting from Trade-for-Trade to Rolling Settlement requires dematerialisation threshold, certification, and exchange reporting obligations to regulator Companies with connectivity to both depositories may be shifted from Trade-for-Trade Settlement to Normal Rolling Settlement only if at least 50% of other-than-promoter holdings are in dematerialised form, 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 no other grounds for continuation of TFTS exist; stock exchanges must report actions taken in their Monthly/Quarterly Development Report.