Division 4.3

The direction of impact must be parallel to the longitudinal axis of the frontal protection system as mounted on the vehicle or test frame, with the axis of the upper legform vertical at the time of the first contact. The tolerance to these directions is ± 2 °. At the time of first contact the impactor centre line must be coincident with the selected test point with a ± 10 mm tolerance both laterally and vertically.