Federal Motor Vehicle Safety Standards; Fuel System Integrity of Compressed Natural Gas Vehicles Over 4536 Kilograms Gross Vehicle Weight Rating

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The purpose of this notice is to assess the need to regulate the fuel system integrity of vehicles with a gross vehicle weight rating (GVWR) of greater than 4536 kilograms that are fueled with compressed natural gas (CNG). Comments are requested regarding the need for fuel system integrity standards for CNG-powered vehicles with a GVWR of greater than 4536 kilograms, including transit buses, intercity buses, trucks, and other heavy vehicles.