SDCL § 49-17-21: Contracts for continuation and improvement of freight service.

The South Dakota Transportation Commission may enter into on behalf of the state and for any county or municipality, upon the request of the governing body of such county or municipality, compacts, contracts, or agreements with any state or states, and with public or private corporations operating railroad lines if such compact, contracts, or agreements are deemed necessary for the continuance or improvement of railroad freight service in South Dakota.