Section 25270.5 Of Article 7. Flashing And Colored Lights From California Vehicle Code >> Division 12. >> Chapter 2. >> Article 7.

. Any motor vehicle engaged in, or aiding in, the herding of livestock along or across a public roadway may display flashing amber warning lights to the front, sides, or rear of the vehicle while it is stopped in the roadway near the livestock or is proceeding with the livestock along the roadway.