143—LPG-powered vehicles
(1) An LPG system installed in a motor vehicle, and the vehicle, must comply with all relevant requirements set out in the version of Australian Standard AS 1425 or Australian/New Zealand Standard AS/NZS 1425 that was current at the time the system was installed in the vehicle.
(2) A motor vehicle that has an LPG system installed must have fixed conspicuously to its front and rear number plates the labels required by the version of Australian Standard AS 1425 or Australian/New Zealand Standard AS/NZS 1425 that was current at the time the system was installed in the vehicle.
(3) If a motor vehicle had an LPG system installed before Australian Standard AS 1425-1973 was first published, the vehicle must have fixed conspicuously to its front and rear number plates a label—
(a) that is made of durable material; and
(b) that is at least 25 millimetres wide and 25 millimetres high; and
(c) that is of a reflective red that conforms with either Australian Standard AS 1743-1975 or Australian Standard AS 1906.1-1976 Retroreflective Materials and Devices for Road Traffic Control Purposes—Part 1: Retroreflective Materials ; and
(d) that states ‘LPGAS’ or ‘LPG’, or similar words or acronyms that have the same meaning, in capital letters at least 6 millimetres high.