(1) Where a motor vehicle or trailer is used on a public road at night a lamp shall be kept burning on the motor vehicle or trailer, so contrived as to illuminate by means of reflection, transparency or otherwise, and render easily distinguishable, every number and letter on the licence plate fixed on the back of the motor vehicle or trailer.
(2) In the application of this regulation to a motor cycle, the plate fixed on the front of the cycle may, if desired, be substituted for the plate fixed on the back of the cycle.