S.D. Codified Laws § 32-6B-3.6
In addition to the consignment sales requirements provided in this chapter, any dealer or public auction may sell, or offer to sell, used motorcycles and used off-road vehicles as defined in § 32-3-1 on consignment if the dealer has in possession a South Dakota title for the vehicle or a state title for the vehicle from a bordering state. If the motorcycle or off-road vehicle owner's state does not issue titles for the consigned motorcycle or off-road vehicle, the owner must provide a current state registration and accompanying affidavit stating that their home state does not issue titles for the vehicle being consigned. A bill of sale, the registration, and affidavit of statement must be in the possession of the consignment selling dealer or public auction along with the proper consignment contract. The department shall prescribe the form of the contract.
SDCL 32-6B-3.6