Thanks Daffy,
I guess their HR people will handle it. However, since they interviewed me in Thailand, rather than as an expat hire, I thought they just may expect me to know the ropes.
At first I took the point of view that if I was contracted from, and paid in my own country, that I would be just like a visiting executive on assignment. Then I started to think I may have some problems with Thai officialdom.
As things proceed, I'll check with the HR people.
Cheers,
Liam