Montana Title 61. Motor Vehicles § 61-5-116. License to be carried and exhibited on demand

(1) A licensee must have the licensee's driver's license in the licensee's immediate possession at all times when operating a motor vehicle and shall display the license upon demand of a justice of the peace, a city or municipal judge, a peace officer, a highway patrol officer, or a field deputy or inspector of the department. However, a person charged with violating this section may not be convicted if the person produces in court or the office of the arresting officer a driver's license issued to the person and valid at the time of the person's arrest.