Dematerialisation requirement: shift from trade for trade to rolling settlement permitted if majority non promoter holdings are dematerialised and both depositories connected. Companies with connectivity to both depositories may be shifted from trade for trade to rolling settlement if a majority of non promoter holdings are dematerialised, evidenced by a certificate from the Registrar and Transfer Agent or, if no RTA exists, from a practicing Company Secretary or Chartered Accountant, and if there are no other grounds to continue trade for trade treatment; stock exchanges must report such actions in their development reports.