Montana Title 13. Elections § 13-2-220. Maintenance of active and inactive voter registration lists for elections--rules by secretary of state

(a) compare the entire list of registered electors, including electors on the absentee ballot list, against the national change of address files and provide appropriate confirmation notice to those individuals whose addresses have apparently changed;

(b) mail a nonforwardable, first-class, “return if undeliverable--address correction requested” notice to all registered electors, including electors on the absentee ballot list, of each jurisdiction to confirm their addresses and provide the appropriate confirmation notice to those individuals who return the notices;

(c) mail a targeted mailing to electors, including electors on the absentee ballot list, who failed to vote in the preceding federal general election, applicants who failed to provide required information on registration forms, and provisionally registered electors by:

(2)(a) Any notices returned as undeliverable to the election administrator or any notices to which the elector fails to respond after the election administrator uses the procedures provided in subsection (1) must be followed within 30 days by an appropriate confirmation notice that is a forwardable, first-class, postage-paid, self-addressed, return notice.

(b) If the elector fails to respond within 30 days of the final confirmation notice, after the 30th day, the election administrator shall move the elector to the inactive list and work with the secretary of state's office and the motor vehicle division in the department of justice to verify the elector's address.

(c) If the election administrator is not able to verify the elector's address, the elector must be placed on the inactive list until they follow the procedure in 13-2-222 or 13-2-304, as applicable.