S.D. Codified Laws § 46A-4-36
The board of directors shall meet at its usual place of meeting on the first Monday after each election and canvass the return. If at the time of meeting the returns from each precinct in the district in which the polls were opened have been received, the board of directors shall proceed to canvass the returns. However, if some of the returns have not been received, the canvass shall be postponed from day to day until all the returns have been received, or until postponements have been had. The canvass shall be made in public and by opening the returns and ascertaining the vote of the district for each person voted for and declaring the results of the canvass. No list, tally paper, or certificate returned from any election may be set aside or rejected for want of form if it can be satisfactorily understood.
SDCL 46A-4-36