This regulation applies to the approval of front position lamps, rear position lamps, stop lamps, direction indicators, and rear registration plate illumination devices intended to be fitted to moped, motor cycles and vehicles treated as such. This regulation require general specification as the device must be so designed and constructed that in normal use, and despite the vibrations to which they may be subjected, their satisfactory operation continue to be assured and they retain the characteristics, intensity of light emitted, conformity of production.