S.D. Codified Laws § 46A-10A-58 (2026)
The board may act upon a written drainage project petition only if it is signed by a majority of the resident owners of lands described in the petition who are likely to be affected by the proposed drainage. If potentially affected land is sold under a contract for deed which is of record in the office of the register of deeds, both the seller and the purchaser of the land shall be treated as owners.
Source: SL 1985, ch 362 , § 58.