South dakota constitution
Article XXX: marijuana and hemp
Section 15

This article shall be broadly construed to accomplish its purposes and intents. Nothing in this article purports to supersede any applicable federal law, except where allowed by federal law. If any provision in this article or the application thereof to any person or circumstance is held invalid or unconstitutional, such invalidity or unconstitutionality shall not affect other provisions or applications of the article that can be given effect without the invalid or unconstitutional provision or application, and to this end the provisions of this article are severable.