S.D. Codified Laws § 3-13-97 (2026)
An automatic enrollment unit may elect to commence automatic escalation in either January or July. Automatic escalation commences the January or July immediately after the automatic enrollment unit's decision is delivered in writing to the system, as long as notice of the decision is received no later than September fifteenth for a January start or March fifteenth for a July start. If the notice of the unit's decision is received after those dates, automatic escalation commences the following January or July, as elected by the unit.
Source: SL 2025, ch 27 , § 124.