copied from regulations:
3.5.6 Bargeboard height
No bodywork which, in plan view, is in the area enclosed by the intersection of the following
lines may be more than 350mm above the reference plane :
- a) A longitudinal line parallel to and 800mm from the car centre plane.
- b) A diagonal line running rearwards and outwards, from a point 430mm rearward of the
front wheel centre line and 240mm from the car centre plane, at an angle of 4.5° to the
car centre plane.
- c) A transverse line 430mm rearward of the front wheel centre plane.
- d) A line running through a point 625mm forward of the plane C-C and 320mm from the
car centre plane, running parallel to the diagonal line defined in Article 3.5.5(c).