AcctOpngAmdmntReq
                Mandatory
                Refs
                Mandatory
                Fr
                Optional
                CtrctDts
                Optional
                UndrlygMstrAgrmt
                Optional
                Acct
                Mandatory
                Account Servicer Identification
AcctSvcrId
                Mandatory
                Definition: Unique and unambiguous identifier of a financial institution, as assigned under an internationally recognised or proprietary identification scheme.
Type: BranchAndFinancialInstitutionIdentification6
FinInstnId
                Mandatory
                BrnchId
                Optional
                Org
                Mandatory
                Mndt
                Repetition (0..n)
                Grp
                Repetition (0..n)
                RefAcct
                Optional
                DgtlSgntr
                Repetition (0..n)
                SplmtryData
                Repetition (0..n)