S.D. Codified Laws § 32-3A-36
Any person who is an owner of a boat who is required to apply for title or registration, or both, and whose legal residence or chief place of business is outside the state, shall submit an application, a copy of a valid title if from a title issuing state from another jurisdiction or other form of ownership acceptable to the department and payment of all applicable fees to the county treasurer. Upon receipt of such information, the county treasurer shall issue a nonnegotiable interstate title. A nonnegotiable title is not a valid legal document for any purpose or transaction except to make application for yearly South Dakota registration. The nonnegotiable title is valid as long as title ownership remains the same. Failure to apply for a title as provided by this section is a Class 2 misdemeanor.
SDCL 32-3A-36