S.D. Codified Laws § 1-27-39

Upon receipt, the Office of Hearing Examiners shall promptly mail a copy of the notice of review filed pursuant to § 1-27-38 and all information submitted by the requestor to the public record officer named in the notice of review. The entity denying the written request may then file a written response to the Office of Hearing Examiners within ten business days. If the entity does not file a written response within ten business days, the Office of Hearing Examiners shall act on the information provided. The Office of Hearing Examiners shall provide a reasonable extension of time to file a written response upon written request or agreement of parties.