S.D. Codified Laws § 58-16-8
Current with legislation signed by the governor on or before 3/6/2024
The members eligible for insurance under a policy issued under § 58-16-7 shall be all of the members of the union, or all of any class or classes thereof determined by conditions pertaining to their employment, or to membership in the union, or both.
SDCL 58-16-8