According to the ICE FIX Trade Capture Specification, the legacy
CFICode (Tag 461) value OXXXXX will be decommissioned on May 29, 2026 and will no longer be supported.
To continue requesting Options Security Definitions, implementations must be updated to use the supported CFICode value:
461=OXXFXX
If needed, the current version of our FIX Trade Capture specification can be found here on ICE Service Community:
ICE FIX Trade Capture Reference Manual
Please ensure your implementation is updated to the supported request format before the decommissioning date to avoid any disruption in processing security definition requests.