This setting determines whether to retain the itinerary of the existing carrier service, or override it with the itinerary in a Vessel Schedule (IFTSAI) EDI file with the message function O (Original), X (Replace), and U (Update) being processed.
Options:
OVERRIDE_ITINERARY(Default): Overrides the itinerary of the carrier service with the itinerary in the EDI message.
RETAIN_ITINERARY - Retains the itinerary of the carrier service.