AcctOpngAmdmntReq
                Mandatory
                Refs
                Mandatory
                Fr
                Optional
                CtrctDts
                Optional
                UndrlygMstrAgrmt
                Optional
                Acct
                Mandatory
                AcctSvcrId
                Mandatory
                Org
                Mandatory
                Mndt
                Repetition (0..n)
                Grp
                Repetition (0..n)
                RefAcct
                Optional
                Identification
Id
                Optional
                Definition: Unique and unambiguous identification for the account between the account owner and the account servicer.
Type: AccountIdentification4Choice
IBAN
                Choice
                Othr
                Choice
                Tp
                Optional
                Ccy
                Optional
                Nm
                Optional
                Prxy
                Optional
                DgtlSgntr
                Repetition (0..n)
                SplmtryData
                Repetition (0..n)