An act relating to the modification of a motor vehicle’s exhaust system

This bill prohibits modifying a motor vehicle's exhaust system to produce noise levels exceeding 95 decibels, affecting all vehicle owners and operators in Vermont. It establishes a specific measurement standard using SAE International guidelines to determine compliance and allows for dismissal of violations if the operator had reasonable grounds to believe the vehicle was legal. The law includes an exemption for vehicles used in authorized racing or speed demonstrations and takes effect on July 1, 2024.