Is it mandatory to issue delivery instructions for securities to meet delivery obligations in demat mode in various scrips in a settlement/auction? Critically examine.

Instead of issuing Delivery instructions for their securities delivery obligations in demat mode in various scrips in a settlement/auction, a facility has been made available to the member-brokers of automatically generating Delivery instructions on their behalf from their Clearing Member (CM) Pool accounts maintained with National Securities Depository Ltd. (NSDL) and CM Principal Accounts maintained with Central Depositories Services (India) Ltd. CDSL. This auto delivery facility is available for CRS (Normal & Auction) and for trade to trade settlements. This facility is, however, not available for delivery of non-pari passu shares and shares having multiple International Securities Identification Number (ISINS). The member-brokers wishing to avail of this facility have to submit an authority letter to the Clearing House. This auto delivery facility is currently available for CM Pool accounts and Principal accounts maintained by the member-brokers with NSDL and CDSL respectively.