Unique ID for this settlement instruction.
Required except where SettlInstMode is 5=Reject SSI request
New, Replace, Cancel or Restate
Insert here the set of "Parties" (firm identification) fields defined in "Common Components of Application Messages"
Used here for settlement location.
Also used for executing broker for CIV settlement instructions
Effective (start) date/time for this settlement instruction.
Date/time this settlement instruction was last updated (or created if not updated since creation).