Montana Title 45. Crimes § 45-1-102. General purposes and principles of construction

(a) to forbid and prevent conduct that unjustifiably and inexcusably inflicts or threatens harm to individual or public interests;

(b) to safeguard conduct that is without fault from condemnation as criminal;

(c) to give fair warning of the nature of the conduct declared to constitute an offense;

(d) to differentiate on reasonable grounds between serious and minor offenses.