(a)
Vehicles manufactured on or
after December 25, 1968. Each bus, truck, and truck-tractor manufactured
on or after December 25, 1968, must have a windshield defrosting and defogging
system that meets the requirements of FMVSS No. 103 in effect on the date of
manufacture.
(b)
Vehicles manufactured before
December 25, 1968. Each bus, truck, and truck-tractor shall be equipped
with a means for preventing the accumulation of ice, snow, frost, or
condensation that could obstruct the driver’s view through the windshield while
the vehicle is being driven.