A quick question: I've booked a DONE5 (already ticketed) and would like to change the timing of my first segment (still same routing) to get a slightly later flight. On reading the OWE fare rules, it states: "Changes to first international flight are not permitted". Does this mean no changes whatsoever, or only changes to routing of first flight are ruled out?

I also wanted to check that my reading of voluntary re-routing changes to later parts of the itinerary is correct: if tickets have already been issued, re-routing can be done FOC up to when travel commences, therafter there is a per-segment change fee applicable.