VEH §27606: (a) No person shall own or operate a motor vehicle which is equipped with a light bar, or facsimile thereof, to resemble a motor vehicle used by a peace officer or traffic officer while on duty within

(a) No person shall own or operate a motor vehicle which is equipped with a light bar, or facsimile thereof, to resemble a motor vehicle used by a peace officer or traffic officer while on duty within that jurisdiction for the primary purpose of enforcing Division 10 (commencing with Section 20000) or Division 11 (commencing with Section 21000) pursuant to Section 40800. (b) For purposes of this section the following definitions apply: (1) A “light bar” means any light or device affixed to or mounted upon the roof of a vehicle and extending the width of the roof, or a substantial portion thereof, which emits amber, red, or blue, or any combination of those lights. (2) A “facsimile of a light bar” is any device designed or contrived to resemble a light bar regardless of the degree of light emission or lack thereof. (c) This section shall not apply to a vehicle, if all of the following conditions are satisfied: (1) The vehicle is possessed by a federal, state, or local historical society or museum that is open to the public. (2) The vehicle is secured from unauthorized operation. (3) The vehicle is not operated on any public road or highway, unless one of the following applies: (A) The vehicle is being operated within a temporary street closure for the purposes of celebrations, parades, local special events, and other purposes when the operation is approved by local authorities having jurisdiction over the street closure. (B) The vehicle is of a model year of at least twenty-five years prior to the year of operation.