amend the reasons for challenging an individual's eligibility to vote.

SB 30 restricts the reasons a voter's eligibility can be challenged to only one specific issue: whether the voter has already voted or registered to vote in another state. The bill deletes existing provisions allowing challenges based on residency (per §12-1-4) or U.S. citizenship status. This change directly affects voters whose eligibility might be challenged, county auditors who process such challenges, and the Secretary of State who can file them. The policy change narrows the grounds for filing eligibility challenges, making it harder to contest a voter's registration on residency or citizenship grounds.