Versions of South Dakota Codified Laws 7-18A-15. Referendum petition--Number of signatures required--Emergency measures excepted on LawServer 2023 South Dakota Codified Laws 7-18A-15. Referendum petition–Number of signatures required–Emergency measures excepted 2022 South Dakota Codified Laws 7-18A-15. Referendum petition–Number of signatures required–Emergency measures excepted 2021 South Dakota Codified Laws 7-18A-15. Referendum petition–Number of signatures required–Emergency measures excepted 2019 South Dakota Codified Laws 7-18A-15. Referendum petition–Number of signatures required–Emergency measures excepted 2018 South Dakota Codified Laws 7-18A-15. Referendum petition–Number of signatures required–Emergency measures excepted 2016 South Dakota Codified Laws 7-18A-15. Referendum petition–Number of signatures required–Emergency measures excepted 2014 South Dakota Codified Laws 7-18A-15. Referendum petition–Number of signatures required–Emergency measures excepted 2010 South Dakota Laws 7-18A-15 – Referendum petition–Number of signatures required–Emergency measures excepted