SDCL § 15-38-37: (Rule 6(b)) Times for service and filing of briefs.

Unless the times are shortened by the circuit court, the appellant shall serve and file his brief within thirty days after the filing of the transcript or within thirty days after notice of appeal where there is no transcript. The appellee shall serve and file his brief within thirty days after service of appellant's brief; and appellant may serve and file a reply brief within ten days after service of appellee's brief.