Dematerialisation threshold for segment shift: securities may move from trade for trade to rolling settlement when non promoter holdings meet the demat requirement. Securities may be shifted from the Trade for Trade Segment to Rolling Settlement where companies have established connectivity with both depositories and at least 50% of non promoter holdings are dematerialised; certification from the Registrar and Transfer Agent is required, or from a practicing Company Secretary/Chartered Accountant if no separate RTA exists, and no other grounds for continuation in TFTS must exist. Stock exchanges must report actions taken in the Monthly/Quarterly Development Report, Section II item 13.