Division 2.1.2 The rear of the wheel guard shall not terminate above a horizontal plane 150 mm above the axis of rotation of the wheels, furthermore:

In case of single wheels, the intersection of the rear edge of the wheel guard with the horizontal plane as defined in paragraph 2.1.2 (see Figure 1, point A) shall lie outwards of the median longitudinal plane of the tyre.

In the case of twin wheels, the intersection of the rear edge of the wheel guard with the horizontal plane as defined in paragraph 2.1.2 (see Figure 1, point A) at the outside wheel shall lie outwards of the median longitudinal plane of the outermost tyre.