S.D. Codified Laws § 1-16A-75
The authority shall establish a statewide funding program for the purchase from schools or cooperative educational service units of notes, whether issued under chapter 13-19 or otherwise, in anticipation of the receipt of moneys for school or cooperative educational service units purposes to alleviate cash flow difficulties and to otherwise improve the financial well-being of the schools or cooperative educational service units. The authority may issue its bonds or notes and use the proceeds therefrom for the purpose of making loans to or purchasing the notes of any school district or cooperative educational service units for the use of the various funds of the school district or cooperative educational service units for any lawful school district or cooperative educational service units purpose excluding debt service. Bonds or notes issued pursuant to §§ 1-16A-19, 1-16A-74 to 1-16A-76, inclusive, and 13-19-1.2 may be secured by a pledge of payments made to the authority by the school district or cooperative educational service units, to be derived from the receipt of anticipated funds, grants, aid or other moneys as may be evidenced by, or pledged to secure, the notes of the school district or cooperative educational service units, including a pooling of payments of notes from two or more participating school districts or cooperative educational service units.
SDCL 1-16A-75