California Vehicle Code ARTICLE 1 - Horns, Sirens and Amplification Devices

• Section 27000.
  (a) A motor vehicle, when operated upon a highway, shall be equipped with a horn in good working order and capable of emitting sound audible under...
• Section 27001.
  (a) The driver of a motor vehicle when reasonably necessary to insure safe operation shall give audible warning with his horn.(b) The horn shall not otherwise be...
• Section 27002.
  No vehicle, except an authorized emergency vehicle, shall be equipped with, nor shall any person use upon a vehicle any siren except that an authorized...
• Section 27003.
  An armored car may be equipped with a siren which may be used while resisting armed robbery. At all other times, the siren shall not...
• Section 27007.
  No driver of a vehicle shall operate, or permit the operation of, any sound amplification system which can be heard outside the vehicle from 50...

Last modified: October 22, 2018