Validity
This Executive Order approved the specified parts on on March 3, 2004.
As of Thursday, January 2nd, 2025 this Executive Order has not been overturned or superceeded.
This Executive Order approved the specified parts on on March 3, 2004.
As of Thursday, January 2nd, 2025 this Executive Order has not been overturned or superceeded.
Models | Modification |
---|---|
2003-2004 model-year heavy-duty diesel engines originally certified to a non-methane hydrocarbons plus oxides of nitrogen emission standard of 2.5 g/bhp-hr or higher and not otherwise equipped with an aftertreatment emission control system such as a catalytic converter or a diesel particulate filter | This exemption is only valid provided the engines meet the following operating conditions: (1) the engine exhaust temperature is greater than or equal to 210 degrees Celsius for 40 percent of the typical duty cycle, (2) the NOx to PM ratio is at least 8, and (3) the engine is operated using diesel fuel with a maximum sulfur content of 50 ppmw. |