S.D. Codified Laws § 5-18D-16

The Bureau of Human Resources and Administration shall purchase, if the price is reasonably competitive and the quality is acceptable, soybean-based inks in lieu of conventional inks for use in any state government operations. The bureau may require the use of soybean-based inks by any private vendor under contract to a state agency in carrying out the terms of the contract if the price of the inks is reasonably competitive and the quality is acceptable.