S.D. Codified Laws § 46A-1-23
All such notes and the interest on the notes may be secured by a pledge of, and payable from, any income and revenue (subject to the prior payment of the operation and maintenance expenses of any project) derived from the project to be undertaken with the proceeds of the notes; the proceeds to be derived from the sale of any revenue bonds for permanent financing authorized to be issued under this chapter; the project itself; any funds, property, or obligation of any public entity or person with whom the district has entered into a financing arrangement under § 46A-1-18 in connection with the project; the proceeds of the notes; or any grant or loan to be made by an agency or instrumentality of the United States government in connection with the project.
SDCL 46A-1-23