S.D. Codified Laws § 3-18-15.4 (2026)
Nothing in this chapter prevents a governmental agency from legally changing any ordinance, policy, or rule that is currently the subject matter of a grievance procedure. However, any prior contractual rights may not be affected by a subsequent change of any ordinance, policy, or rule.
Source: SL 1970, ch 27 , § 1; SL 1993, ch 375 , § 2.