This message is sent by an instructing party, eg, a broker-dealer, to a depositary bank or its authorised representative. It may also be sent by an owner of a depositary receipt to its custodian.
It is used to instruct the issuance or release of a depositary receipt from/to ordinary shares, or to instruct the conversion from one type of depositary receipt to another. It may also be used to:
request the cancellation of a previously sent depositary receipt instruction
re-send a depositary receipt instruction previously sent
provide a third party with a copy of the message (be it the depositary receipt instruction or request for cancellation) being sent.