SDCL § 1-15-12: Supplies not to be purchased from institution employees.

No supplies of any kind may be purchased for state institutions from any officer or employee of any state institution, or from any firm or corporation in which such officer or employee may be interested, and it is unlawful for the state auditor to allow any bills to any such officer, employee, or corporation or firm in which they may be interested, for any supplies of any kind or character for any state institution.