Versions of South Dakota Codified Laws 36-25-17.3. License required--Small on-site wastewater system work on LawServer 2023 South Dakota Codified Laws 36-25-17.3. License required–Small on-site wastewater system work 2022 South Dakota Codified Laws 36-25-17.3. License required–Small on-site wastewater system work 2021 South Dakota Codified Laws 36-25-17.3. License required–Small on-site wastewater system work