this must be a law only in your area also depends on what u mean by refiner if you mean buyers theres plenty great ones on here do ur research but if u mean actual refiner there is here to do your research cause right now your not getting enough for real refining if your only getting a van tailer load every few months say start at 10,000lbs first and go from there cause u will get less money as you would be paying more to rifine it than what ur sending in not quite but you get the idea still do ur reasearch