Mont. Code Ann. § 13-17-509
Vote-counting machine maintenance -- examination
13-17-509 . Vote-counting machine maintenance -- examination. (1) Upgrades, patches, fixes, or alterations may not be applied to any vote-counting machine during the 30 days following a federal election.
(2) If a vote-counting machine fails an audit pursuant to 13-17-507 , the vote-counting machine is subject to examination by a computer software expert in consultation with a voting system vendor.