S.D. Codified Laws § 34-45-35
A law enforcement agency or any public safety answering point on behalf of a law enforcement agency may request, from a wireless telecommunications carrier, information regarding the location of a telecommunications device, if the highest ranking person on duty at the agency authorizes the request based on a determination that:
Upon receiving a request under this section, a wireless telecommunications carrier shall immediately provide the location to the law enforcement agency, together with any known subscriber information and information regarding the last time the device was used.
Each wireless telecommunications carrier doing business in this state shall provide to the Department of Public Safety a phone number for law enforcement emergency support services. Each carrier shall review the phone number at least twice each year and notify the department of any changes immediately.
The department shall maintain the list of phone numbers and provide the list to every public safety answering point and to the South Dakota state radio system.
A claim for relief may not be brought in any court against any wireless service carrier or any other person who in good faith provides information regarding the location of a telecommunications device in accordance with this section.
SDCL 34-45-35