S.D. Codified Laws § 7-18A-15.1
Any legislative decision of a board of county commissioners is subject to the referendum process. A legislative decision is one that enacts a permanent law or lays down a rule of conduct or course of policy for the guidance of citizens or their officers. Any matter of a permanent or general character is a legislative decision.
No administrative decision of a governing body is subject to the referendum process, unless specifically authorized by this code. An administrative decision is one that merely puts into execution a plan already adopted by the governing body itself or by the Legislature. Supervision of a program is an administrative decision. Hiring, disciplining, and setting the salaries of employees are administrative decisions.
SDCL 7-18A-15.1