Return Bitfields Per Message

Table 1. Bitfield Table Legend

Entry	Description
R	Indicates that the field must be specified for a message
O	Indicates that the field can be specified for a message
-	Indicates that the field cannot be specified for a message
(Blank)	Indicates that the field is not used by Cboe Options and cannot be specified for a message

Input messages containing invalid fields (i.e., Blank) will be rejected. In the case of rejected input messages, the associated Reject message sent back to the customer will contain a RejectReason code non-optional field (See Order Reason Codes) and a Text non-optional field containing descriptive text.