Montana Title 2. Government Structure and Administration § 2-17-424. Acceptable uses--rulemaking

(1) The department of administration shall adopt reasonable rules defining the acceptable uses for a state-owned or leased motor vehicle. The rules may allow for limited personal use of a state-owned or leased motor vehicle for emergency, travel-related purposes and other lawful activities that do not result in excessive mileage or excessive wear and tear on the motor vehicle. The rules may not permit the routine personal use of a state-owned or leased vehicle that is assigned to an employee on a 24-hour, 7-day-a-week basis.

(2) The department of administration shall adopt reasonable rules governing the determination of when the use of privately owned vehicles on state business may be justified as in the best interest of the state.