Group says decision allows fast-track for imports by easing sustainability requirements.

Group thinks proposal will backtrack from last year’s production level.

Investigation to last between 12 and 15 months.

Incentive provides a 2¢ per-gallon refundable credit for the first 25 million gallons of biodiesel produced at a single plant.

Lawsuit by petroleum interests challenges handling of the 2013 renewable fuel volume requirements.