Originally Posted by christep
Correct for before travel commences. Afterwards it is a per change, not per segment change. In other words you can completely redo the whole ticket from the current point for a one-time US$75
Fresh back from several hours at the AA ticket desk at LHR T3 - not the most glamorous location but the only place you can go for re-issue since AA closed its central London office... I was charged USD 75 per ticket for re-issue.

Showed them the OWE rules which explicitly state that this isn't the case before travel commences but it wouldn't wash on them, given that it was on BA stationery.
I'd thought OWE was a standard product offered by all OW airlines and, therefore, that any surcharges would also be uniform??