C.R.S. § 42-4-218

(1) Head lamps arranged to provide a single distribution of light not supplemented by auxiliary driving lamps shall be permitted on motor vehicles manufactured and sold prior to July 15, 1936, in lieu of multiple-beam road-lighting equipment specified in section 42-4-216 if the single distribution of light complies with the following requirements and limitations: (a) The head lamps shall be so aimed that when the vehicle is not loaded none of the high-intensity portion of the light shall, at a distance of twenty-five feet ahead, project higher than a level of five inches below the level of the center of the lamp from which it comes and in no case higher than forty-two inches above the level on which the vehicle stands at a distance of seventy-five feet ahead. (b) The intensity shall be sufficient to reveal persons and vehicles at a distance of at least two hundred feet. (2) Any person who violates any provision of this section commits a class B traffic infraction.