This message is sent by a trading party to its triparty agent to instruct the agent to perform a specific action on a collateral management transaction.
This message is also used to request the cancellation of a previously sent Triparty Collateral Instruction.
The message may also be used to:
re-send a message previously sent (Subfunction of the message is DUPL)
provide a third party with a copy of the message for information (Subfunction of the message is COPY)
re-send to a third party a copy of the message for information (Subfunction of the message is CODU)