Montana Vehicles Permitted to Use Emergency Vehicle Lights
(a) “Authorized emergency vehicle” means a vehicle of a governmental fire agency organized under Title 7, chapter 33, an ambulance, or an emergency vehicle designated or authorized by the department.
(1) A police vehicle must be equipped with a siren capable of giving an audible signal and may be equipped with alternately flashing or rotating red or blue lights as specified in this section.
(2) An authorized emergency vehicle must be equipped:
(a) with a siren and an alternately flashing or rotating red light as specified in this section; and
(b) with signal lamps mounted as high and as widely spaced laterally as practicable that are capable of displaying to the front two alternately flashing red lights located at the same level and to the rear two alternately flashing red lights located at the same level. These lights must have sufficient intensity to be visible at 500 feet in normal sunlight.