S.D. Codified Laws § 58-11-71
The director shall review the resubmitted filing and certification, and shall approve or disapprove it within thirty days. Notice of deficiencies or disapproval shall be in writing and shall provide a detailed description of the reasons for the disapproval and sufficient detail for the filer to bring the policy form into compliance and shall cite any specific statute, rule, or bulletin upon which the disapproval is based. No further extensions of time may be taken unless the filer has introduced new provisions in the resubmission or the filer has materially modified any substantive provisions of the policy form, in which case the director may extend the time for review by an additional thirty days. At the end of the review period, the policy form is deemed approved if the director has taken no action.
SDCL 58-11-71