AcctOpngAmdmntReq
                Mandatory
                Refs
                Mandatory
                Fr
                Optional
                CtrctDts
                Optional
                UndrlygMstrAgrmt
                Optional
                Ref
                Mandatory
                SgnOffDt
                Optional
                Version
Vrsn
                Optional
                Definition: Identification of the version of the contract.
Type: Max6Text (String)
Restrictions:
- MinLength: 1
 - MaxLength: 6
 
Acct
                Mandatory
                AcctSvcrId
                Mandatory
                Org
                Mandatory
                Mndt
                Repetition (0..n)
                Grp
                Repetition (0..n)
                RefAcct
                Optional
                DgtlSgntr
                Repetition (0..n)
                SplmtryData
                Repetition (0..n)