Starting in 2009, the Formula Hybrid rules stood alone as a complete document, incorporating the necessary car construction and safety rules from the Formula SAE rulebook. One large change for 2009 was the fuel allotment. In 2007–2008, teams were given an allotment to cover the entire event. In 2009, this allotment was smaller, but was only applied to the endurance event. Teams were free to use as much fuel as needed for the other events, provided the car was filled by event officials.