The provisions of §§ 32-22-27 and 32-22-28 shall not apply to traction engines or tractors, the propulsive power of which is asserted, not through wheels resting upon the ground but by means of a flexible band or chain generally known as a movable track when the portions of the movable tracks in contact with the surface of the highway present a plane surface.

Source: SDC 1939, § 44.0336 (6) (e) as added by SL 1943, ch 158 , § 2; SL 1947, ch 192 ; SL 1953, ch 234 ; SL 1957, ch 223 , § 2; SL 1959, ch 260 , § 2.