S.D. Codified Laws § 3-12C-112
Vested defined
For purposes of this chapter, "vested" means the right to a retirement benefit from the system, as provided for in this chapter, after three years of contributory service or noncontributory service, even if the member leaves the employment of a participating unit, provided the member does not withdraw accumulated contributions.
Source: SL 2019, ch 22, § 8; SL 2025, ch 27, § 12.