S.D. Codified Laws § 34-18-21
Each person conducting a lodging establishment or campground shall keep a record of guests. Such a record may be kept in a register or on separate cards and shall be opened for inspection and copying by the secretary of health for the purpose of protecting the health or life of persons or for an emergency which may affect the public health. The inspection and copying shall take place during business hours and shall be conducted by an authorized department inspector after presentation of identification. The registry shall contain the name of the guest, the number in the party, the place of permanent residence of the guest, the date of registration, the date of departure, the daily rate charged, and the motor vehicle license number of the registrant. The record shall also include each rate, price, or fee charged to the guest for the guest's stay at the lodging establishment or campground, as required by subdivision 37-24-6(8). These records shall be kept for a minimum of one year.
SDCL 34-18-21