SDCL § 38-32-3.2: Absentee voting.

If voting at the designated time and place would cause a hardship on any eligible voter, the council shall allow for absentee voting on forms, and in a manner, prescribed in rule by the council. Absentee ballots shall be returned either to the council office no later than five calendar days prior to the day of the election or to the polling location prior to the close of the polls. The council shall ensure that any absentee ballot it has received within the deadline specified in this section is delivered to the appropriate polling place prior to the close of the polls. No absentee ballot that is received at the polling place after the close of the polls may be counted in the election results.