This message is sent by the collateral giver or its collateral manager to the collateral taker or its collateral manager to propose the substitution of collateral held.
This message is also sent by the collateral taker or its collateral manager to the collateral giver or its collateral manager to request the substitution of collateral held.
This message is also used by the giver or taker to request the cancellation of a previously sent collateral substitution.
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).
