No person shall use motor vehicle brakes which are in any way activated or operated by the compression of the engine of such motor vehicle or any unit or part thereof, unless such braking system is equipped with a functional muffler. Such prohibition shall not apply if an emergency situation exists, and the use of unmuffled engine compression brakes is necessary for the protection of persons or property.
(Res. 2004-07, passed 12-9-2004) Penalty, see § 70.99