Mandatory admission of debt instruments on both depositories strengthens investor protection and requires issuers to comply. Mandatory admission of issuer debt instruments on both depositories is required to ensure centralised dematerialised holding and improved investor protection. Issuers remain non compliant and stock exchanges and depositories are instructed to notify and secure compliance. The directive is issued under Section 11(1) of the Securities and Exchange Board of India Act, 1992, directing coordinated action by exchanges, depositories and custodians to implement the admission requirement.