Dematerialisation requirement: securities may shift from trade for trade to rolling settlement if non promoter holdings are dematerialised and certified. Stock exchanges may shift securities from Trade-for-Trade to normal Rolling Settlement where issuers have established connectivity with both depositories and the required proportion of other than promoter holdings is dematerialised; the issuer must submit a certificate from its RTA or, if no separate RTA exists, from a practicing company secretary or chartered accountant, and exchanges must ensure no other grounds for continuation of TFTS exist and report actions in their Monthly/Quarterly Development Report.