As per section 80.2 of the regulations, an oxygenated fuels program control area means a geographic area in which only oxygenated gasoline may be sold or dispensed during the control period. An oxygenated fuels program control period means the period during which oxygenated gasoline must be sold or dispensed in any oxygenated gasoline control area, pursuant to section 211(m)(2) of the Act, and as specified in EPA guidance.

Control seasons vary from 4-7 months in length depending on the state implemented program. A list of geographic areas required to implement oxygenated fuels programs and the length of their specific control periods is attached at the end of this document as Attachment I.(7/1/94)

This question and answer was posted at Consolidated List of Reformulated Gasoline and Anti-Dumping Questions and Answers: July 1, 1994 through November 10, 1997 (PDF)(333 pp, 18.17 MB, EPA420-R-03-009, July 2003, About PDF)