CtrctRegnClsrReq
                Mandatory
                GrpHdr
                Mandatory
                MsgId
                Mandatory
                CreDtTm
                Mandatory
                NbOfItms
                Mandatory
                InitgPty
                Mandatory
                Nm
                Optional
                PstlAdr
                Optional
                Optional
                CtryOfRes
                Optional
                Contact Details
CtctDtls
                Optional
                Definition: Set of elements used to indicate how to contact the party.
Type: Contact4
NmPrfx
                Optional
                Nm
                Optional
                PhneNb
                Optional
                MobNb
                Optional
                FaxNb
                Optional
                EmailAdr
                Optional
                EmailPurp
                Optional
                JobTitl
                Optional
                Rspnsblty
                Optional
                Dept
                Optional
                Othr
                Repetition (0..n)
                PrefrdMtd
                Optional
                FwdgAgt
                Optional
                RegdCtrctClsr
                Repetition (1..n)
                SplmtryData
                Repetition (0..n)