Fixing and maintenance of registration plates

The owner of the motor vehicle shall forthwith affix or cause to be affixed and keep affixed on the front of the motor vehicle one of such registration plates in such manner that the number thereon shall be upright and clearly discernible from a distance of twenty yards in front of the vehicle and the other of such plates at the rear of the vehicle in such manner that the number thereon shall be upright and illuminated and clearly discernible at any distance up to twenty yards.