IID and/or the 24/7 Sobriety Program (twice-daily breath tests or continuous alcohol monitoring) are the signature Montana sanctions; IID mandatory on repeat/aggravated convictions.
By offense
First offense: IID not required at this level — IID or 24/7 Sobriety Program participation is common as a condition; IID mandatory on repeats/aggravated.
Second offense: IID required
Third offense: IID required
Fourth+ offense: IID required
Statute: MCA § 61-8-1027; Title 44 ch. 4 part 12 (24/7)
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