In Phase 2a (equities) and Phase 2b (options), Industry Members are required to report a New Order event or New Option Order event (MENO or MONO) representing receipt or origination of the order with applicable handlingInstructions, as well as any subsequent actions taken on the order (e.g., executing, routing away or canceling).  

Beginning in Phase 2c (equities) and Phase 2d (options), in addition to reporting the receipt or origination of the order with applicable handlingInstructions, Industry Members will be required to report an Order Effective event or Option Order Effective event (MEOE or MOOE) when all underlying conditions of an order (i.e., the Stop) are met such that the order becomes and remains effective until it is fully executed or cancelled. Refer to the Industry Member Reporting Scenarios document for additional information.

Additionally, beginning December 5, 2022, the Multi-Leg Order Effective event (MLOE) is required to be reported to indicate that a multi-leg order, or an underlying condition of a multi-leg order, has become effective.

See also:  

•    See FAQ B57 regarding how the orderType and handlingInstructions fields must be populated for Stop, Stop Limit, Stop on Quote, Stop Limit on Quote, Trailing Stop, and Trailing Stop Limit orders.
•    See FAQ B60 regarding which party has the obligation to report the Order Effective event/Option Order Effective event/Multi-Leg Order event (MEOE/MOOE/MLOE) to CAT.
•    See FAQ B61 for information on reporting requirements for Stop Stock orders.
•    See FAQ B62 for information related to the reporting requirements for Trailing Stop and Trailing Stop Limit orders.
•    See FAQ B67 for information related to Stop orders when the exact stop price is unknown because it is either based on an underlying condition or will be determined by the destination venue.