Compulsory dematerialised trading mandates affected scrips be transacted only in demat form, shifting non compliant scrips to trade for trade. Compulsory dematerialised trading is directed for specified scrips and requires those scrips to be transacted in dematerialised form by all investors once connectivity with both depositories is established and a three month transition period expires. Scrips failing to establish connectivity by the scheduled date are to be traded only in the trade for trade settlement window until connectivity is achieved; scrips that subsequently establish connectivity return to normal trading with deliveries in physical or dematerialised form and become compulsorily dematerialised three months after restoration.