Montana Gov. Brian Schweitzer, an outspoken advocate for biodiesel, stopped the passage of a bill that would have allowed a $500 tax credit for biodiesel consumers. Unable to determine the overall implications of the legislation because the state budget hadn’t been finalized yet, Schweitzer said the bill’s estimated $3 million economic impact was simply too much to approve without final numbers in place. House Bill 822 didn’t pass by the two-thirds majority vote necessary to override the veto.