RctAck
                Mandatory
                MsgId
                Mandatory
                Rpt
                Repetition (1..n)
                RltdRef
                Mandatory
                Ref
                Mandatory
                MsgNm
                Optional
                RefIssr
                Optional
                Mandatory
                AnyBIC
                Choice
                PrtryId
                Choice
                Name And Address
NmAndAdr
                Choice
                Definition: Name and address of a party.
Type: NameAndAddress5
Nm
                Mandatory
                Adr
                Optional
                LEI
                Optional
                ReqHdlg
                Mandatory
                SplmtryData
                Repetition (0..n)