Dargie,
The company has said quite a bit about taxes and royalties over the years.
There's a royalty, a company tax and the decree 20 tax (the one they only pay if they don't spend it on exploration). There's also a withholding tax on funds repatriated.
The annual accounts gives a pretty good picture of how it all pans out in reality - about as good as I've seen in any regime, eg comparable with onshore Australia.
EL
IPM
incremental petroleum limited
