Tasmanian Consolidated Regulations
(1) If the engine power of a motor bike is transmitted to the rear wheel by a chain, the driver and any passenger must be protected from the front sprocket and at least the upper part of the chain by
(a) the frame or equipment of the motor bike; or
(b) a chain guard.
(2) A chain guard must cover the chain to a point
(a) at least 300 millimetres to the rear of the rearmost foot rest; or
(b) above the centre of the rear drive sprocket.