| 8 | BeginString | Y | String | FIXT.1.1 |
| 9 | BodyLength | Y | Length | Standard FIX message body length |
| 35 | MsgType | Y | String | The message type. See relevant section. |
| 49 | SenderCompID | Y | String | Sender identity as agreed with the exchange operator. |
| 56 | TargetCompID | Y | String | Intended target identity as agreed with the exchange operator. |
| 50 | SenderSubID | C | String | Sender sub-identifier representing an individual user (as previously agreed with the exchange operator). Required on all application messages related to the entry or management of orders. |
| 57 | TargetSubID | N | String | Target sub-identifier representing an individual user (as previously agreed with the exchange operator) |
| 34 | MsgSeqNum | Y | SeqNum | FIX Message sequence number |
| 43 | PossDupFlag | N | Boolean | Always required for retransmitted messages as the result of a resend request |
| 52 | SendingTime | Y | UTCTime | Sending time in UTC |