Division 4.4

The direction of impact must be downward and rearward and in a vertical plane parallel to the longitudinal axis of the frontal protection system as mounted on the vehicle or the test frame. The tolerance for this direction is ± 2°. The angle of impact for tests with the impactor must be 50° ± 2 ° to the ground reference level. The effect of gravity must be taken into account when the impact angle is obtained from measurements taken before the time of first contact.