This is why I am wary of doing anything, theres rules and regulations for everything
I think there saying mudguards must be fitted to be legal, but the ralliart ones are mudflaps, its all to confusing
32 Mudguards and spray suppression
(1) A vehicle must have firmly fitted a mudguard for each wheel or for adjacent wheels.
(2) However, subclause (1) does not apply to a vehicle if:
(a) the construction or use of the vehicle makes the fitting of mudguards unnecessary or impracticable, or
( the body or part of the body of the vehicle acts as a mudguard.
(3) A mudguard fitted to a vehicle must, when the wheels of the vehicle are in position to move straight ahead:
(a) reduce the danger of a person contacting the moving wheels, and
( for the rear wheels:
(i) cover the overall tyre width of the wheel or wheels to which it is fitted, and
(ii) be fitted so the height above ground level of the lowest edge of the rear of the mudguard is not over one-third of the horizontal distance between the edge and the centre of the rearmost axle.
(4) However, a mudguard may be up to:
(a) 230 millimetres above ground level, or
( on a vehicle built to be used off-road—300 millimetres above ground level.
(5) The outside of a rear mudguard, except a mudflap, of a vehicle that can be seen from the rear of the vehicle must be coloured white or silver if the vehicle:
(a) is at least 2.2 metres wide, and
( has a body the vertical measurement of which is under 300 millimetres at the rear, measured from the lowest point of the body above ground level to the highest point, and
© is not fitted with rear marking plates in accordance with clause 127.
(6) For subclause (5) (a), the width of a vehicle is measured disregarding any anti-skid device mounted on wheels, central tyre inflation systems, lights, mirrors, reflectors, signalling devices and tyre pressure gauges.
From http://www.legislati....2 0 N?tocnav=y