require a voter use a pen when marking a ballot.

This bill requires voters in South Dakota to use a pen to mark their ballots, directly affecting all individuals casting votes in the state. The key provision mandates that ballot marking must be done with a writing instrument rather than allowing alternative methods like pencils or digital tools. This change standardizes the physical process of voting to ensure clear and legible ballot markings. The policy applies to all in-person and mail-in voting scenarios where a voter marks their ballot by hand.