Mandatory
This date specifies for
a new trade (22B=CONF), the start date
a change (22B=CHNG or CINT), the effective date of the change
the settlement (22B=SETT), the value date of the closing.
Date must be a valid date expressed as YYYYMMDD (Error code(s): T50).
When cancelling (22A=CANC), this date should contain the same date as the cancelled confirmation.