Termination and Eviction in Montana
An unconditional 5 day notice to quit can be used for a tenant repeating the same act, that constituted a lease violation and for which notice was given, within 6 months. Mont. Code Ann. § 70-24-422
An unconditional 3 day notice to quit may be used for an unauthorized pet or person living on premises; destroying or removing any part of the premises; being arrested for or charged with drug- or gang-related activity
Any other noncompliance with rental agreement that can’t be remedied or repaired allows for a tenant to be served with a 14 day notice to quit or face eviction.
Any other noncompliance that can be remedied may be given a 14 day notice to cure or quit.