SDCL § 49-28-41: Cooperation with FMCSA--Department as party in proceedings before FMCSA.

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.