The fuel tank must be capable of being filled to capacity without manipulating the tank or the vehicle in any manner. The Fuel System must be designed in a way that during refueling of the car on a level surface, the formation of air cavities or other effects that cause the fuel level observed at the sight tube to drop after movement or operation of the car (other than due to consumption) is prevented. During fueling or refueling the vehicle may only be touched by the fuel crew and officials. The tank will be filled to the fill line, or if a filling system is used, to the automatic stop point. If, for any reason, the fuel level changes after the team have moved the vehicle, then no additional fuel will be added.