104 STAT. 2514 PUBLIC LAW 101-549—NOV. 15, 1990 purposes of certification at 120,000 miles, except that in-use testing shall not be done for a period beyond 7 years or 90,000 miles (or the equivalent) whichever first occurs. 42 USC 7583. " SEC. 243. STANDARDS FOR LIGHT-DUTY CLEAN FUEL VEHICLES. "(a) EXHAUST STANDARDS FOR LIGHT-DUTY VEHICLES AND CERTAIN LIGHT-DUTY TRUCKS.— The standards set forth in this subsection shall apply in the case of clean-fuel vehicles which are light-duty trucks of up to 6,000 lbs. gross vehicle weight rating (gvwr) (but not including light-duty trucks of more than 3,750 lbs. loaded vehicle weight (Ivw)) or light-duty vehicles: "(1) PHASE I. —Beginning with model year 1996, for the air pollutants specified in the following table, the clean-fuel vehicle standards under this section shall provide that vehicle exhaust emissions shall not exceed the levels specified in the following table: PHASE I CLEAN FUEL VEHICLE EMISSION STANDARDS FOR LIGHT-DUTY TRUCKS OF UP TO 3,750 LBS. LVW AND UP TO 6,000 LBS. GVWR » AND LIGHT-DUTY VEHICLES Pollutant 50,000 mile standard 100,000 mile standard NMOG 0.125 0.156 CO 3.4 4.2 NO, 0.4 0.6 PM 0.08* HCHO (formaldehyde) . 0.015 0.018 Standards are expressed in grams per mile (gpm). ' Standards for particulates (PM) shall apply only to diesel-fueled vehicles. In the case of the 50,000 mile standards and the 100,000 mile standards, for purposes of certification, the applicable useful life shall be 50,000 miles or 100,000 miles, respectively. "(2) PHASE II. —Beginning with model year 2001, for air pollutants specified in the following table, the clean-fuel vehicle standards under this section shall provide that vehicle exhaust emissions shall not exceed the levels specified in the following table. PHASE II CLEAN FUEL VEHICLE EMISSION STANDARDS FOR LIGHT- DUTY TRUCKS OF UP TO 3,750 LBS. LVW AND UP TO 6,000 LBS. GVWR AND LIGHT-DUTY VEHICLES HCHO Pollutant NMOG CO NO, PM* (formaldehyde) 50,000 mile standard 0.075 3.4 0.2 0.015 100,000 mile standard 0.090 4.2 0.3 0.08 0.018 Standards are expressed in grams per mile (gpm). 'Standards for particulates (PM) shall apply only to diesel-fueled vehicles. In the case of the 50,000 mile standards and the 100,000 mile standards, for purposes of certification, the applicable useful life shall be 50,000 miles or 100,000 miles, respectively. "(b) EXHAUST STANDARDS FOR LIGHT-DUTY TRUCKS OF MORE THAN 3,750 LBS. LVW AND UP TO 5,750 LBS. LVW AND UP TO 6,000 LBS. GVWR.—The standards set forth in this paragraph shall apply in
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