The argument is one for the courts but here is how I look at it. WMO is used freely and without taxes by oil change companies to heat their stores in the winter.. so the only difference is you are using it for power generation. If they can tax garbage being used for power I would be surprised. I can run a gasser on wood.. how can they tax something I can pick off the side of the road.
It is like KY, there is coal everywhere, can pick it up off the road.. how can you tax that? No WMO, if it is being taxed, is something that is happening because we let it and someone simply has to put out here on SS that they are going to court, maybe we can start a lawyer fund to help you battle it. We have a great excuse, we are mostly running MULTI-fuel, they were built to run this crap.. this is not some red neck mod this is solid tech (40 years old but whos counting)
I for one will have a good supply (from the city I work for) and will keep it on hand stored for personal use (55 gallon drums a plenty), but since I have a historic vehicle tag I am bypassing many of the issues you face running a commercial tag. Of course my fuels will be for parades, rallys and the coming Zombie invasion and we all know zombies do not care if the truck running them over is running WMO, WVO, Wood gas, or fresh diesel