S.D. Codified Laws § 58-17-36
The insurer may, at its option, include in the provision in § 58-17-34 a definition of "valid loss of time coverage," approved as to form by the director, which definition shall be limited in subject matter to coverage provided by governmental agencies or by organizations subject to regulation by insurance law or by insurance authorities of this or any other state of the United States or any province of Canada, or to any other coverage the inclusion of which may be approved by the director or any combination of such coverages. In the absence of such definition such term shall not include any coverage provided for such insured pursuant to any compulsory benefit statute, including any workers' compensation or employer's liability statute, or benefits provided by union welfare plans or by employer or employee benefit organizations.
SDCL 58-17-36