S.D. Codified Laws § 31-12A-17
If the initial trustees are to be elected at the meeting at which the incorporation election is held as provided in § 6-16-5, the trustees shall be nominated by the eligible voters in attendance at the meeting. Otherwise, the initial trustees shall be nominated as provided in § 6-16-5.2. Any trustee to be elected at any subsequent election, shall be nominated by filing with the district clerk not less than fifteen days before the subsequent election, a certificate of nomination for the office of trustee. The certificate shall be in writing and shall contain the name of the candidate, residence, business address, and the office for which the candidate is named, and shall be signed by at least five percent of the eligible voters.
SDCL 31-12A-17