The department shall cooperate with the FMCSA, in the administration of motor carrier laws. The department may appear before the FMCSA, the secretary, or the board as a party litigant in all proceedings involving the regulation and control of motor carriers in interstate commerce if, in its opinion, the public interest of the state justifies such participation.

Source: SDC 1939, § 44.0403; SL 1985, ch 374, § 35; SL 1999, ch 223, § 9; SL 2006, ch 234, § 10.