For some reason even in the “fare rules” we read in the “Fare Qoute Display” on Amadeus it doesn’t mention Free Change on the Day...

We just know if V2 is contained in the Fare Basis that it is Free Change on the Day eligible. Also there is certain keywords within bookings (except flights operated by Iberia / ticketed by Iberia where only the V2 in Fare basis tell us) which let us know it’s eligable.

They wouldn’t need to create separate fare rules for HBO fares as HBO Fare basis usually contain “Z0R” rather than “V2R”.......

SDC only applies to Point to Point journeys, openjaw at origin or destination included. Never on through tickets (unless it’s separate tickets within one PNR)