The EPA, directed by the Noise Control Act, addressed the motorcycle noise problem by creating a simple enforcement tool specifically for local police, called the "label match-up". This simple tool, and the national plan were to be carried out by:
All motorcycle manufacturers have been building, testing, and labeling their motorcycles and their quiet original equipment exhaust systems as required by the federal laws and regulations since 1983. In my seventeen year career as a motorcycle mechanic, I can attest to literally seeing tens of thousands of them.