S.D. Codified Laws § 58-24-2

This chapter applies to all forms of casualty insurance, including fidelity, surety, and guaranty bonds, to all forms of property, fire, marine, and inland marine insurance, workers' compensation, and to any combination of any of the foregoing, on risks or operations in this state. Inland marine insurance shall be deemed to include insurance now or hereafter defined by statute, or by interpretation thereof, or if not so defined or interpreted, by ruling of the director, or as established by general custom of the business, as inland marine insurance.