S.D. Codified Laws § 13-53-23.1

For the purpose of §§ 13-53-23 to 13-53-41, inclusive, residence, means the place where a person has a permanent home, at which the person remains when not called elsewhere for labor, studies, or other special or temporary purposes, and to which the person returns at times of repose. It is the place a person has voluntarily fixed as the person's permanent habitation with an intent to remain in such place for an indefinite period. A person, at any one time, has but one residence and a residence in not lost until another is gained.