California Revenue and Taxation Code
Except where the context otherwise requires, the definitions given in this chapter govern the construction of this chapter and this part.
"Interstate user" includes any person who uses diesel fuel in the operation of a qualified motor vehicle in this state and who operates the qualified motor vehicle within and without this state or the United States.
"Qualified motor vehicle" means a motor vehicle used, designed, or maintained for transportation of persons or property that (a) has two axles and a gross vehicle weight or registered gross vehicle weight exceeding 26,000 pounds or 11,797 kilograms, (b) has three or more axles regardless of weight, or (c) is used in combination, when the weight of that combination exceeds 26,000 pounds or 11,797 kilograms gross vehicle weight. "Qualified motor vehicle" does not include recreational vehicles.
"Recreational vehicle" means motor vehicles such as motor homes, pickup trucks with attached campers, and buses when used exclusively for personal pleasure by an individual. In order to qualify as a recreational vehicle, the motor vehicle shall not be used in connection with any business endeavor.
"Diesel vendor" means every person who sells diesel fuel in this state and places, or causes to be placed, the diesel fuel into a fuel tank of a qualified motor vehicle and at the time of sale, collects the diesel fuel tax from an interstate user.