Headlamp systems that provide only a single distribution of light shall be permitted on motor vehicles manufactured and sold before June 1, 1944, instead of the specified multiple-beam road-lighting equipment, if the single distribution of light complies with the following requirements and limitations:
(1) The headlamps are so aimed that, when the vehicle is not loaded, none of the high-intensity portion of the light at a distance of 25 feet ahead projects higher than a level of 5 inches below the level of the center of the lamp from which it comes and, in no case, higher than 42 inches above the level on which the vehicle stands at a distance of 75 feet ahead; and
(2) The intensity shall be sufficient to reveal persons and vehicles at a distance of at least 200 feet.