CheckInData
Contains the data elements to set check-in and gate data. Identification
If UniqueFlightLegId is included it is used as the only identification element. It must have been received previously by data from the airport system responsible for allocating it, typically an AODB.Required if UniqueFlightLegId isn't included. Required if UniqueFlightLegId isn't included. Required if UniqueFlightLegId isn't included. Strongly preferred if UniqueFlightLegId isn't included. Check-in data