I believe that with the lack of substantive documentation for the centuries of kava consumption, we can't definitively say that they chose not to drink it because they didn't like the feeling. I believe in centuries of experimentation and kava usage would show the Ni-Vanuatu which kavas do what (including possible negative side-effects). While they might not have known what FKB was, that doesn't mean that they didn't start to notice certain undesirable health effects and therefore put it in a different class. Of course this is purely conjecture, which leads me to...
The guy (well, one of three) who literally wrote the book on kava, Dr. Vincent Lebot who is a geneticist, would be the best person to classify classes of kava. In the
Codex Alimentarius Commission E, there is a list of known, safe kava and there is a proposal to develop a codex standard for kava that will apply to all kava, regardless of the origin as once can see.
Regardless of semantics, as I said before, quantitative research is starting to include kava and the Department of Agriculture has more than enough resources to ensure the kava exported from Vanuautu is safe. I don't believe that all non-exportable kavas are tudei (as some are too "weak", young, etc), but I do believe that if any country is going to be thorough with kava, it is Vanuatu and not PNG which is nowhere close to Vanautu when in regards to legal statutes regarding kava, scientific research and resources. Therefore, if they ban a kava from export, there is good reason. PNG has no regulatory framework for kava (as far as I know) and not to be cynical, but exportation is money.
_____________________________________________________________________
Qualitative tests are explained by the Dr. Lebot here and both Kapm and I conducted our own qualitative colorimetric tests on various samples.
Mine:
http://www.kavaforums.com/forum/thr...qualitative-type-test-in-lab.1543/#post-15436
After e-mailing the above to Dr. Lebot, he confirmed that the amber color of the "Koniak" sample was indeed tudei.
_____________________________________________________________________
Disclaimer: The Koniak that was tested in the following attachment was not confirmed to be the same Koniak that Bula Kava House sells.
It can be called "ISA" since that is a "native" and commonly used word in PNG, but I think it's a bit farfetched to argue that ISA, tudei and tuday are different other than the etymology.