BuyInRgltryAdvc
                Mandatory
                AcctOwnr
                Optional
                Identification
Id
                Mandatory
                Definition: Unique identification of the party.
Type: PartyIdentification127Choice
AnyBIC
                Choice
                PrtryId
                Choice
                LEI
                Optional
                SfkpgAcct
                Mandatory
                BuyInAttrbts
                Repetition (1..n)
                SplmtryData
                Repetition (0..n)