I don't know that Law but in Az we fueled up at a truck stop that had a lower price than others. Went in and had to sign a log or form and out plate number and was refunded the difference from higher semi truck taxes.
We fueled at RV lanes in Kingman Pilot. There were three Class As in line. The price was the same as auto pumps. I thought, then, there might be a problem but everyone seemed to be fueling at auto diesel or RV diesel pumps, at the same price. We don't have three axles but are over 26,000 by a good bit.
Since half of the US moves to Az for the winter, they stand to make a lot of money from us, in fuel taxes. If they alienate enough RVers they will lose a lot more tax revenues, as well as retail and RV resort and campgrounds' incomes. Snowbirds probably pay half the income, for Az governments and 3/4 of the jobs. Maybe they don't realize that.
