Revise voter list maintenance procedures to apply to permanent address changes

This bill updates Montana's voter registration procedures to ensure that address verification processes specifically target permanent address changes rather than temporary moves. It requires election administrators to compare voter lists against national change-of-address files and mail confirmation notices to registered voters who appear to have moved permanently. The law also mandates that voters who fail to respond to these notices after 30 days be moved to an inactive list until they verify their address or re-register. Additionally, the bill clarifies that voters on the absentee ballot list who have not filed a permanent change of address with the U.S. Postal Service must continue receiving absentee ballots for subsequent elections. These changes aim to improve the accuracy of voter rolls while maintaining protections for eligible voters who have changed their permanent residence.