CorpActnInstrStsAdvc
                Mandatory
                InstrId
                Optional
                OthrDocId
                Repetition (0..n)
                CorpActnGnlInf
                Mandatory
                InstrPrcgSts
                Repetition (1..n)
                CorpActnInstr
                Optional
                OptnNb
                Mandatory
                OptnTp
                Mandatory
                OptnFeatrs
                Optional
                AcctOwnr
                Optional
                SfkpgAcct
                Optional
                BlckChainAdrOrWllt
                Optional
                CshAcct
                Optional
                SfkpgPlc
                Optional
                FinInstrmId
                Optional
                TtlElgblBal
                Optional
                InstdBal
                Optional
                UinstdBal
                Optional
                Short Long Position
ShrtLngPos
                Mandatory
                Definition: Sign of the quantity of security.
Type: ShortLong1Code (String)
Allowed Values:
- SHOR (Short): Position is short, that is, the balance is negative.
- LONG (Long): Position is long, that is, the balance is positive.
QtyChc
                Mandatory
                PrtctBal
                Optional
                StsQty
                Optional
                StsCshAmt
                Optional
                SlctnDealrFeeInd
                Optional
                PrtctInstr
                Optional
                AddtlInf
                Optional
                SplmtryData
                Repetition (0..n)