In Washington, the U.S. Environmental Protection Agency approved health effects testing on E15 fuel submitted by the Renewable Fuels Association and Growth Energy. Health effects testing is a required step in the approval of any new fuel or fuel additive. The acceptance of the health effects testing clears the way for the final steps in registering E15 as a fuel and offering it in the marketplace.
One step is to have ethanol and fuel companies register with EPA. The other step is the formulation of a misfueling mitigation plan. Once this plan is completed, and companies register with EPA, E15 can be sold to the EPA-approved vehicles in states and at stations that are prepared to do so.
More information on the E15 waiver, including final steps left to take, is available here.