| Tag | Field Name | Req'd | Comments | 
                           
                              | 453 | NoPartyIDs | N | Repeating group below should contain unique combinations of PartyID <448>, PartyIDSource <447>, and PartyRole <452>
                                  | 
                           
                              | => | 448 | PartyID | N | Used to identify source of PartyID <448>. Required if PartyIDSource <447> is specified. Required if NoPartyIDs <453> > 0.
                                  | 
                           
                              | => | 447 | PartyIDSource | N | Used to identify class source of PartyID <448> value (e.g. BIC). Required if PartyID <448> is specified. Required if NoPartyIDs <453> > 0.
                                  | 
                           
                              | => | 452 | PartyRole | N | Identifies the type of PartyID <448> (e.g. Executing Broker). Required if NoPartyIDs <453> > 0.
                                  | 
                           
                              | => | 802 | NoPartySubIDs | N | Repeating group of Party sub-identifiers. | 
                           
                              | => | => | 523 | PartySubID | N | Sub-identifier (e.g. Clearing Acct for PartyID <448>=Clearing Firm) if applicable. Required if NoPartySubIDs <802> > 0.
                                  | 
                           
                              | => | => | 803 | PartySubIDType | N | Type of Sub-identifier. Required if NoPartySubIDs <802> > 0.
                                  |