S.D. Codified Laws § 10-4-46
All property or any portion thereof owned by a labor union and used exclusively for an educational purpose is exempt from taxation. To receive the exemption, a labor union shall be recognized as an exempt organization under section 501(c)(5) of the United States Internal Revenue Code, as amended and in effect on January 1, 2013. For purposes of this section, educational purpose, means apprenticeship or training programs that have been accredited or approved by the Bureau of Apprenticeship and Training within the United States Department of Labor. However, if any such property consists of improved or unimproved property located within a municipality not occupied or directly used in carrying out the primary objective of the labor union owning the same, the property shall be taxed the same as other property of the same class is taxed. However, if any such property consists of agricultural land, the property shall be taxed the same as other property of the same class is taxed.
SDCL 10-4-46