Terms used in this chapter mean:
The term includes diesel fuel, fuel oil, heating fuel, biodiesel, all special fuel blends, and all kerosene products except K-1. The term does not include motor fuel, liquid petroleum gas, liquid natural gas, compressed natural gas, or natural gas which is not compressed natural gas. The term, special use fuel, is synonymous with the term, special fuel;
SDCL 10-47B-3