Allocation ACK StandardHeader Standard Header Y MsgType = P 109 ClientID ClientID N Used for firm identification in third-party transactions. 76 ExecBroker ExecBroker N Used for firm identification in third-party transactions. 70 AllocID AllocID Y 75 TradeDate TradeDate Y 60 TransactTime TransactTime N Date/Time allocation Ack generated 87 AllocStatus AllocStatus Y 88 AllocRejCode AllocRejCode N Required for AllocStatus = 1 (rejected) 58 Text Text N Can include explanation for AllocRejCode = 7 (other) StandardTrailer Standard Trailer Y