Gov. Brian Kemp signed legislation Tuesday that makes additional changes to Georgia’s election laws ahead of the 2024 presidential contest in the battleground state, including defining probable causes for removing voters from the rolls when their eligibility is challenged.

Republican activists — fueled by debunked theories of a stolen election — have challenged more than 100,000 voters in the state in recent years. The activists say they are rooting out duplicate records and removing voters who have moved out of state.

The bill Kemp signed into law — SB 189 — lists death, evidence of voting or registering in another jurisdiction, a tax exemption indicating a primary residence elsewhere, or a nonresidential address as probable causes for removing voters from the rolls. Most controversially, it says the National Change of Address list can be considered, though not exclusively.

Supporters have said the probable cause definition would make the challenge process more difficult. Opponents have disputed that, saying the changes would enable more baseless attacks on voters that would overwhelm election administrators and disenfranchise legitimate voters. For example, people sometimes live at a place of business, which would be considered a nonresidential address. Officials with Georgia Secretary of State Brad Raffensperger’s office say there are more reliable types of information, such as driver’s license data, to confirm a voter’s eligibility.