S.D. Codified Laws § 45-9-42
Current with legislation signed by the governor on or before 3/6/2024
If the persons owning the required percentage of interest in the unit area do not approve the plan for unit operations within a period of six months from the date on which the order providing for unit operations is made, such order shall be ineffective, and shall be revoked by the Board of Minerals and Environment unless for good cause shown the board extends such time.
SDCL 45-9-42