South Dakota Codified Laws
Chapter 05A - Compensation For Damages From Mining, Oil And Gas Development
Section 45-5A-8 - Offer of settlement by developer.

45-5A-8. Offer of settlement by developer.
Unless both parties provide otherwise by written agreement, within sixty days after the mineral developer receives notice of damages the mineral developer shall make a written offer of settlement to the person seeking compensation for the damages. The person seeking compensation may accept or reject any offer so made within sixty days of receipt.

Source: SL 1982, ch 304, ยง8.