25.1.8.020 When Lighted Lamps are Required

Every vehicle upon a highway within this reservation at any time from a half hour after sunset to a half hour before sunrise and any other time when there is not sufficient light to render clearly discernible persons and vehicles on the highway at a distance of 500 feet ahead shall display lighted lamps and illuminating devices as hereinafter respectively required for different classes of vehicles, subject to exceptions with respect to parked vehicles as hereinafter stated.