S.D. Codified Laws § 46A-7-42
When there has been no redemption of the land so sold at tax sale to an irrigation district, or to any other person, or of the land struck off to the county for which a certificate of sale has been assigned to an irrigation district, or to any other person, in the manner and within the time prescribed for the redemption of lands from such tax sales, the county treasurer shall issue a tax deed therefor to such irrigation district, or other holder of a certificate of sale. The holder of such certificate of tax sale, whether said holder be an irrigation district or an individual, may at any time after the expiration of two years from the date of sale, if the same has not been redeemed within said period, apply to the county treasurer, as provided by law, for the issuance of a tax deed to said property, and upon such application the county treasurer shall issue such tax deed in manner and form provided by law to said holder.
SDCL 46A-7-42