Western Australian Consolidated Regulations Western Australian Consolidated Regulations (1) Glazing used in a
windscreen of a motor vehicle must have a luminous transmittance of at
least —
(a) for
a motor vehicle built after 1971 — 75%; or
(b) for
another motor vehicle — 70%.
(2) Windscreen glazing
of a motor vehicle must not be coated in a way that reduces its luminous
transmittance.
(3) However, subrules
(1) and (2) do not apply to the greater of the following areas of a
windscreen —
(a) the
area above the highest point of the windscreen that is swept by a windscreen
wiper;
(b) the
upper 10% of the windscreen.
(4) Glazing used in a
window or interior partition of a motor vehicle must have a luminous
transmittance of at least 70%.
(5) Glazing in a
window other than the windscreen may be coated to achieve a luminous
transmittance of not less than 35%.
(6) Glazing that has
been coated to reduce its luminous transmittance must not have a reflectance
of over 10%.
(7) The luminous
transmittance requirement in subrule (5) applies to a vehicle instead of
the corresponding requirement in the relevant ADR.
(8) In this
rule —
glazing means material fitted to the front, sides,
rear or interior of a vehicle, through which the driver can see the road, but
does not include a coating added after manufacture of the material;
luminous transmittance , for glazing, means the
amount of light that can pass through the glazing as a percentage of the
amount of light that would be transmitted if the glazing were absent.