MS HB939

Requires all gasoline sold in Mississippi for motor vehicles on public roads to contain 10% denatured ethanol by volume, effective 12 months after the state certifies ethanol production exceeds 250 million gallons annually and maintains that level for at least 3 months.

Prohibits fuel retailers from selling or accepting non-ethanol-blended gasoline for consumer use on public highways and restricts methyl tertiary butyl ether (MTBE) additives to trace amounts only.

Exempts racing gasoline at racecourses, unleaded premium gasoline with 91+ octane rating, and aviation fuel from the ethanol-blend requirement.

Requires the Department of Agriculture and Commerce to adopt standards and compile quarterly reports certifying denatured ethanol production levels in the state.

Suspends the ethanol requirement if production drops below 125 million gallons on an annualized basis and extends the repeal date of related fuel specifications to July 1, 2015.