Section 25261 Of Article 7. Flashing And Colored Lights From California Vehicle Code >> Division 12. >> Chapter 2. >> Article 7.

. Vehicles used by a county or county department of agriculture and vehicles of duly authorized representatives thereof, actually engaged in weed control or pest detection, may display flashing amber warning lights to the front, sides, or rear when necessarily parked on a highway or when moving at a speed slower than the normal flow of traffic.