Arizona Gov. Doug Ducey signed a law that bans voters from adding signatures on unsigned mail-in ballots after Election Day. The measure, Arizona Senate Bill 1003 (S.B. 1003), was approved earlier in the state legislature in party-line votes. The new law codifies a ruling by the U.S. Court of Appeals for the 9th Circuit on Oct. 6, 2020, within one month of the 2020 election. It also ended disputes over unsigned mail-in ballots between the state Republicans and Democrats. Current Arizona law allows election officials to contact voters to fix the signatures on the ballots if the signatures don’t match other signatures from records in the Department of Motor Vehicle, voter registration forms, or previous early ballots. The voters can fix the signatures, if they failed to pass the verification process, within up to five business days after Election Day. While the new law didn’t change anything about the grace …