The ethanol industry is supported by three primary government incentives: a mandate that requires refiners to use an increasing amount of ethanol each year; a 51-cent-per-gallon tax credit for refiners that add ethanol to gasoline; and a 54-cent-per-gallon tariff on imported ethanol.

Artical found at:
http://www.bread.org/press-room/news/ethanol-incentives-don-t-fuel-food-costs-senate-told.html