Combinations of vehicles of not more than three units may be operated upon a public highway if the combinations consist of truck tractor--semitrailer--semitrailer converted to full trailer by use of a dolly equipped with fifth wheel which is considered a part of the trailer for all purposes and not as a separate unit; truck tractor--semitrailer--full trailer; or truck tractor--semitrailer--semitrailer. If a combination consists of more than two units, the rear unit of the combination shall have breakaway brakes.

Source: SDC 1939, § 44.0336 (2) (d) as added by SL 1959, ch 260 , § 1; SL 1981, ch 245 , § 2; SL 1982, ch 243 , § 2; SL 1983, ch 335 , § 19; SL 1984, ch 230 , § 13; SL 1989, ch 272 , § 1.