(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.
Vote-Counting Machine Maintenance -- Examination
Mont. Code Ann. § 13-17-509, under Postelection Audit.
Mont. Code Ann. § 13-17-509