CtrctRegnClsrReq
                Mandatory
                GrpHdr
                Mandatory
                MsgId
                Mandatory
                CreDtTm
                Mandatory
                NbOfItms
                Mandatory
                InitgPty
                Mandatory
                FwdgAgt
                Optional
                FinInstnId
                Mandatory
                Branch Identification
BrnchId
                Optional
                Definition: Identifies a specific branch of a financial institution.
Type: BranchData3
Optional
                LEI
                Optional
                Nm
                Optional
                PstlAdr
                Optional
                RegdCtrctClsr
                Repetition (1..n)
                SplmtryData
                Repetition (0..n)