Versions of South Dakota Codified Laws 9-20-15. Majority vote required for approval of referred measure--Effective date on LawServer 2023 South Dakota Codified Laws 9-20-15. Majority vote required for approval of referred measure–Effective date 2022 South Dakota Codified Laws 9-20-15. Majority vote required for approval of referred measure–Effective date 2021 South Dakota Codified Laws 9-20-15. Majority vote required for approval of referred measure–Effective date 2019 South Dakota Codified Laws 9-20-15. Majority vote required for approval of referred measure–Effective date 2018 South Dakota Codified Laws 9-20-15. Majority vote required for approval of referred measure–Effective date 2016 South Dakota Codified Laws 9-20-15. Majority vote required for approval of referred measure–Effective date 2014 South Dakota Codified Laws 9-20-15. Majority vote required for approval of referred measure–Effective date 2010 South Dakota Laws 9-20-15 – Majority vote required for approval of referred measure–Effective date