Engine compression brake device - Prohibited - Posting

1. An operator of a commercial motor vehicle may not use an engine compression brake device that creates a noise disturbance in a zone posted as prohibiting the use of an engine compression brake device. 2. Subsection 1 does not apply to the use of an engine compression brake device during an emergency situation. 3. A city or county may adopt an ordinance prohibiting the use of an engine compression brake device in a designated zone and may post the prohibition in the designated zone.