No longer used as of FIX 4.3. Included here for reference to prior versions.
*** REPLACED FIELD - See Appendix 6-F: 3.Replaced Fields: ExecBroker (tag 76), BrokerOfCredit (tag 92), ClientID (tag 109), ClearingFirm (tag 439), ClearingAccount (tag 440), and SettlLocation (tag 166) [Replaced in FIX 4.3] ***
Firm that will clear the trade. Used if different from the executing firm.