SctiesSttlmCondModStsAdvc
                Mandatory
                ReqRef
                Mandatory
                AcctOwnr
                Optional
                SfkpgAcct
                Optional
                BlckChainAdrOrWllt
                Optional
                ReqDtls
                Optional
                Reference
Ref
                Mandatory
                Definition: References of the transaction for which the securities settlement condition modification is requested.
Type: References28
AcctOwnrTxId
                Optional
                AcctSvcrTxId
                Optional
                MktInfrstrctrTxId
                Optional
                CtrPtyMktInfrstrctrTxId
                Optional
                PrcrTxId
                Optional
                PoolId
                Optional
                CmonId
                Optional
                TradId
                Optional
                RstrctnRef
                Repetition (0..n)
                AutomtcBrrwg
                Optional
                RtnInd
                Optional
                Lkg
                Optional
                Prty
                Optional
                OthrPrcg
                Repetition (0..n)
                PrtlSttlmInd
                Optional
                SctiesRTGS
                Optional
                HldInd
                Optional
                MtchgDnl
                Optional
                UnltrlSplt
                Optional
                Lnkgs
                Repetition (0..n)
                PrcgSts
                Mandatory
                SplmtryData
                Repetition (0..n)