(a) In lieu of the multiple-beam lighting equipment required by Section 547.333, a headlamp system that provides a single distribution of light and meets the requirements of Subsection (b) is permitted for:
(1) a farm tractor; or
(2) a motor vehicle manufactured and sold before September 4, 1948.
(b) The headlamp system specified by Subsection (a) shall:
(1) emit a light sufficient to reveal a person or vehicle at a distance of at least 200 feet; and
(2) be aimed so that no part of the high-intensity portion of the lamp projects a beam:
(A) higher than five inches below the level of the center of the lamp at a distance of 25 feet ahead; or
(B) higher than 42 inches above the ground at a distance of 75 feet ahead.