Mich. Comp. Laws § 120.54: Investigation of transportation rates; representation of state and port districts.

Sec. 4.

The department shall conduct investigations of transportation rates and shall represent the state and the various port districts before any agency of this state, the United States, or any agency or department thereof, on all matters relative to the establishment, continuance, modification or discontinuance of transportation rates insofar as the rates affect port districts or shipping operations on the navigable waters of this state.