Versions of South Dakota Codified Laws 32-5B-12. Proration of tax on proportionally registered vehicles on LawServer 2023 South Dakota Codified Laws 32-5B-12. Proration of tax on proportionally registered vehicles 2022 South Dakota Codified Laws 32-5B-12. Proration of tax on proportionally registered vehicles 2021 South Dakota Codified Laws 32-5B-12. Proration of tax on proportionally registered vehicles 2019 South Dakota Codified Laws 32-5B-12. Proration of tax on proportionally registered vehicles–Exemptions to trailers 2018 South Dakota Codified Laws 32-5B-12. Proration of tax on proportionally registered vehicles–Exemptions to trailers 2016 South Dakota Codified Laws 32-5B-12. Proration of tax on proportionally registered vehicles–Exemptions to trailers 2014 South Dakota Codified Laws 32-5B-12. Proration of tax on proportionally registered vehicles–Exemptions to trailers 2010 South Dakota Laws 32-5B-12 – Proration of tax on proportionally registered vehicles–Exemptions to trailers