| Tag | Field Name | Abbr Name | Data Type | Union Datatype | Description | Pedigree |
|---|---|---|---|---|---|---|
| 508 | RegistRefID | RefID / RefID in RegistrationInstruction | String | Reference identifier for the RegistID(513) with Cancel and Replace RegistTransType(514) transaction types. | Added FIX.4.3 Updated EP282 |
|