AcctMndtMntncAmdmntReq
                Mandatory
                Refs
                Mandatory
                Fr
                Optional
                CtrctDts
                Optional
                UndrlygMstrAgrmt
                Optional
                AcctId
                Repetition (1..n)
                Mandatory
                IBAN
                Choice
                Othr
                Choice
                Mandatory
                SchmeNm
                Optional
                Cd
                Choice
                Proprietary
Prtry
                Choice
                Definition: Name of the identification scheme, in a free text form.
Type: Max35Text (String)
Restrictions:
- MinLength: 1
 - MaxLength: 35
 
Issr
                Optional
                Ccy
                Mandatory
                AcctSvcrId
                Mandatory
                Mandatory
                Mndt
                Repetition (0..n)
                Grp
                Repetition (0..n)
                DgtlSgntr
                Repetition (0..n)
                SplmtryData
                Repetition (0..n)