The owner of a motor vehicle shall display a licence disc or licence and roadworthy certificate disc, whichever the case may be, issued in respect of such motor vehicle-
(a) if the motor vehicle is fitted with a transparent windscreen, by affixing it on the lower left hand corner in such a manner that the print on the face of the licence disc or licence and roadworthy certificate disc, whichever the case may be, is clearly legible from the outside to a person standing in front or to the left front of such vehicle;
(b) if the motor vehicle is not fitted with a transparent windscreen, by affixing it in a conspicuous position on the left front side of such motor vehicle in such a manner that the print on the face of such a licence disc or licence and roadworthy certificate disc, whichever the case may be, is clearly legible from that side; or
(c) if such licence disc or licence and roadworthy certificate disc, whichever the case may be, is required to be displayed on a motor vehicle in a position where it is exposed to the weather, be protected by affixing such licence disc or licence and roadworthy certificate disc, whichever the case may be, on the inside of the transparent front of a durable watertight holder.