The RFG regulations were amended on July 20, 1994, to include a product transfer documentation requirement, found in 80.77(g)(3), requiring the "identification of VOC-controlled reformulated gasoline or RBOB as gasoline or RBOB which contains ethanol, or which does not contain ethanol."

This requirement will result in retailers having the necessary information to determine the type of oxygenate used in the gasoline.(10/17/94)

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)