California Code
ARTICLE 7 - Flashing and Colored Lights
Section 25271.5.

25271.5. Any publicly owned vehicle used for the enforcement of animal control laws contained in a statute, local ordinance, or regulation may display flashing or revolving amber warning lights to the front, sides, or rear of the vehicle when actually engaged in the enforcement of those laws and when necessarily parked on a roadway or moving at a speed slower than the normal flow of traffic.

(Added by Stats. 1985, Ch. 131, Sec. 1.)