Propane, natural gas, electricity, and hydrogen, also known as clean fuel or special fuel, used to operate motor vehicles are exempt from state fuel taxes, but subject to a special fuel tax at the rate of three-nineteenths of the conventional motor fuel tax. A reduction in special fuel tax is permissible if the fuel is already taxed by the Navajo Nation. Retailers, wholesalers, and suppliers of special fuel are eligible for a refund of the special fuel tax if dyed diesel fuel is mixed with special fuel and the mixed special fuel is returned to the refinery. For more information, see the Clean Fuel Vehicle Tax Credit website or the Utah State Tax Commission Fuel Taxes website. (Reference Utah Code 59-13-102, 59-13-201, 59-13-301, and 59-13-322)