Segways must be equipped with a method of manipulating the ball in a way that they will not be in danger of falling over. They must be equipped with some method that will keep them upright in the event that the controller fails and the robot tips forward or backwards uncontrollably. Because the Segways must kick the ball to move it down the field, some sort of an actuated kicking device is required because otherwise, just batting the ball with the forward motion of the Segway would constitute dribbling or moving with the ball and this is not allowed.
The only constriants on kicking or ball manipulation mechanisms are