The Environmental Protection Agency is currently seeking public comment on the use of
isobutanol as a fuel additive. Butamax Advanced Biofuels has submitted an application to the
EPA seeking its registration as a fuel additive of up to 16% volume, pursuant to the regulation
titled “Registration of Fuels and Fuel Additives.” The Clean Air Act requires fuel additives to be
registered with the EPA once the manufacturer has met the registration requirements – the
likelihood of the EPA approving the additive is what has prompted the Agency to make the
public aware of the potential registration.