Agreement with depository enables dematerialisation of securities and tripartite arrangement where registrar involved, required to facilitate investor option. Issuers must enter into an agreement with a depository to enable investors to hold securities in dematerialised form when the issuer or investor opts for dematerialisation, subject to exceptions where the depository is the issuer or where Government securities are involved. If a Registrar to the Issue or Share Transfer Agent (with a valid registration certificate) is appointed, the depository shall enter into a tripartite agreement with the issuer and that registrar/agent for securities declared eligible for dematerialisation.