S.C. Code Ann. § 39-41-230
Regulations for alcohol used in motor fuels; alcohol to be anhydrous.
The Department of Agriculture shall promulgate regulations under the provision of Sections 1-23-10 et seq. to ensure the quality of methyl or ethyl alcohol used as motor fuels or in blends with other motor fuel. Alcohol blended with gasoline to produce gasohol shall be anhydrous.