As of early 2013, there were around 11 million flex-fuel vehicles in use in the country,[1][2] but the U.S. Department of Energy estimated that in 2009 only 504,297 flex-fuel vehicles were regularly fueled with E85, and these were primarily fleet-operated vehicles.[37] The Energy Policy Act of 2005, signed into law by President Bush on 8 August 2005, in its Section 701 requires the federal government's fleet of vehicles capable of operating on alternative fuels to be operated on these fuels exclusively,[38] unless a waiver is granted if the alternative fuel is not reasonably available; or if the cost of the fuel required is unreasonably more expensive compared to gasoline. By 2008 the Federal vehicle fleet consisted of 594,900 vehicles, of which 128,491 run on E85, representing the majority of the alternative fuel vehicles in the Federal fleet that year.[39] According to the Government Accountability Office, in 2010 Federal employees received waivers to use gasoline in 55 percent of fleet flex-fuel vehicles because E85 was not available.[20]
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