There is a healthy stockpile of Renewable Identification Numbers to aid Renewable Fuel Standard compliance in 2014 if the Environmental Protection Agency follows through on its intention to adjust the 2014 targets, according to Scott Irwin and Darrel Good, economists at the University of Illinois. If the supply of banked RINs is depleted by 2015, the EPA may have no option but to freeze the requirements for that year, but it is unclear whether the agency has the power to do that, they write.

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