S.D. Codified Laws § 14-2-45
Any governing body or the board of trustees of a joint library with the permission of each of its participating governing bodies shall have the power to enter into a long-term lease, for a term not to exceed thirty years, with or without an option to renew or purchase, for the acquisition of public library buildings. The lease may be for real or personal property, or both, and may cover library building and site or building and contents only, with or without books, furniture, or equipment and may provide for the erection of a public library building and equipping the same with furniture and books of such a public library upon a site owned by the local government unit or the joint library. A lease may be entered into for an existing building or for one to be erected in the future. Rent paid under the terms of a lease may be paid from the general fund of the local governmental unit or may be paid from any fund established for the purpose of providing public library services or the construction of a library.
SDCL 14-2-45