Section 35405 Of Chapter 4. Length From California Vehicle Code >> Division 15. >> Chapter 4.
35405
. (a) An aerodynamic device that extends no more than five
feet beyond the rear of a vehicle shall not be included in measuring
the length of the vehicle or combination of vehicles, if both of the
following conditions are met:
(1) The device does not have the strength, rigidity, or mass to
damage a vehicle, or injure a passenger in a vehicle, that strikes
the vehicle equipped with the device from the rear.
(2) The device does not obscure tail lamps, turn signals, marker
lamps, identification lamps, or any other required safety devices,
including, but not limited to, hazardous materials placards or
conspicuity markings.
(b) For purposes of this section, "aerodynamic device" has the
same meaning as defined in Section 35110.