Phase 2d
Last Updated: 07/31/2025
| # | Status | Summary | Posted Date | Spec Publish Date | Spec Version | Effective Date - Test | Effective Date - Prod |
|---|---|---|---|---|---|---|---|
| 1 | Open | Add new '24X' value for the destination and senderIMID fields and 'G' for marketCenterID field to support 24X National Exchange. | 06/25/2025 | 8/1/2025 | 4.1.0 r9 | 08/25/2025 | 09/29/2025 |
2 | Updated-Open | Add the following four additional error codes to ensure only one clientDetails and only one firmDetails, as applicable, are represented on a side of trade and fulfillment events.
| 7/3/2025 | 9/30/2025 | 4.1.0 r10 | 11/3/2025 | 12/8/2025 |
Phase 2a/2b
Last Updated: 01/11/2022
| # | Status | Summary | Publish Date | Spec Version |
|---|---|---|---|---|
| N/A as of 01/11/2022 |
Phase 2c
Last Updated: 01/11/2022
| # | Status | Summary | Publish Date | Spec Version |
|---|---|---|---|---|
| 1 | Open | Update section 3.4 to clarify requirements for options prior to Phase 2d outlined in Scenario 3.7.3. | N/A | N/A |
| 2 | Open | Clarify description of solicitationFlag field to be consistent with new FAQ C8. | N/A | N/A |
*Planned Technical Specification Updates are subject to approval by the CAT NMS Plan Operating Committee.