10-47B-3.1. Blending of casinghead or natural gasoline with ethyl alcohol prohibited in quantities larger than required for denaturing--Natural gasoline blended products. The blending of casinghead or natural gasoline is not permitted in an ethanol blend fuel product in quantities larger than required to denature the ethyl alcohol. Notwithstanding this prohibition, a natural gasoline blended product can be made by blending natural gasoline and ethyl alcohol. The natural gasoline blended product shall contain no more than twenty-five percent of natural gasoline and shall contain no less than seventy-five percent of ethyl alcohol. The natural gasoline blended product may only be further blended using gasoline.