(a) Every police, fire department and fire patrol vehicle and every ambulance used for emergency calls, except as provided in subsection (b) of this section, shall be equipped with a bell, siren or exhaust whistle.
(b) A vehicle used by a fire chief, deputy fire chief, assistant fire chief, or fire police officer of a duly organized fire department, which is not owned by or the property of the fire department, shall not be equipped with such warning devices.
Structure Delaware Code
Chapter 43. EQUIPMENT AND CONSTRUCTION OF VEHICLES
Subchapter I. Equipment Requirements
§ 4302. Projections from periphery of tires; exceptions.
§ 4303. Brakes — General requirements.
§ 4304. Brakes — Performance requirements.
§ 4305. Brakes — Trailers and semitrailers.
§ 4306. Horns and other sound devices; unlawful use.
§ 4307. Warning devices for emergency vehicles.
§ 4309. Obstructions to view on windshield or windows.
§ 4311. Mufflers; cutout prohibited.
§ 4312. Safety glass — Equipment; definition.
§ 4313A. Commercial window tinting.
§ 4314. Lights and reflectors; change of original design or performance of vehicle.
§ 4315. Penalties for §§ 4301-4316.
§ 4316. Directional signal lights.
§ 4317. Protectors or flaps behind rear wheels of vehicles.