From my experience of 5 OW Explorer tickets issued in South Africa, Australia and New Zealand, reissued with major routing changes in South America, Europe, North America and Australia and printouts of the actual tariff rules from North America, Africa, Asia and South West Pacific you don't have to have the ticket issued in the country where you first start travel but you will pay the higher price of the two - the country where the ticket is purchased or the country where travel originates with the exception of tickets purchased in the US or Canada as noted in my previous post which at least in the fare rules that I had printed out always only cost the price of the country of commencement of travel.

I am certain that if you ring and speak to different agents with the different airlines you'll get a different answer and on occasion they may even ticket contrary to what I've said above but the published fare rules are the published fare rules and they are the only thing that you can reliably plan your trip on and which you can hold the airlines to.

I have on several occasions been told I can't do something only to pull out my copy of the rules, point it out to the reservation agent and have them go ahead and do what I've requested.

The rules are the rules (although I will admit that they change frequently) and if you want definitive information on which to base your planning go into your Oneworld airline and ask them to print them out for you. Any information you get here based on personal experience or what a Oneworld supervisor told someone isn't really worth the paper its not written on! IMHO