S.D. Codified Laws § 34A-5-19
Election of additional trustees if increase approved--Terms of office--Certification
If a majority of the voters approve the question to increase the board of trustees to five, the voters shall elect one additional trustee for a three - year term and one additional trustee for a two - year term at the next regular election and the trustees shall be certified in the same manner as provided by law.
Source: SL 1975, ch 220, § 3; SDCL Supp, § 34-17-16.3; SL 1998, ch 36, § 49.