S.D. Codified Laws § 58-24-10.1
Every insurer writing automobile insurance as defined by subdivisions 58-11-45(1) to (3), inclusive, and subdivision 58-23-6(2), and every insurer writing liability insurance, physical damage insurance, and collision insurance on all motor vehicles ordinarily used on the public highways, except for insurance which falls within the inland marine risk exemption of § 58-24-10 or for insurance policies excluded under the definition of "policy" in subdivision 58-11-45(5), shall file with the director of the Division of Insurance every manual, minimum, class rate, rating schedule, or rating plan and every other rating rule, and modification of any of the foregoing which it proposes to use, and shall indicate the character and extent of the coverages contemplated. The filing date shall be the effective date thereof unless the insurer proposes an effective date subsequent to the filing date. If the director is not satisfied with the information provided to support a filing made in accordance with this section, he shall proceed in accordance with § 58-24-13.
SDCL 58-24-10.1