104 STAT. 2476 PUBLIC LAW 101-549—NOV. 15, 1990 Column A Column B LDT Test weight (5 yrs/50,000 mi) (11 yrs/120,000 mi) Over 5,750 lbs. TW NMHC 0.39 CO 5.0 NO, 1.1* NMHC 0.56 CO 7.3 NO, 1.53 PM 0.12 Standards are expressed in grams per mile (GPM). For standards under column A, for purposes of certification under section 206, the applicable useful life shall be 5 years or 50,000 miles (or the equivalent) whichever first occurs. For standards under column B, for purposes of certification under section 206, the applicable useful life shall be 11 years or 120,000 miles (or the equivalent), whichever first occurs. •Not applicable to diesel-fueled LDTs. " (i) PHASE II STUDY FOR CERTAIN LIGHT-DUTY VEHICLES AND LIGHT- DUTY TRUCKS.— (1) The Administrator, with the participation of the Office of Technology Assessment, shall study whether or not further reductions in emissions from light-duty vehicles and light-duty trucks should be required pursuant to this title. The study shall consider whether to establish with respect to model years commencing after January 1, 2003, the standards and useful life period for gasoline and diesel-fueled light-duty vehicles and light-duty trucks with a loaded vehicle weight (LVW) of 3,750 lbs. or less specified in the following table: "TABLE 3—PENDING EMISSION STANDARDS FOR GASOLINE AND DIESEL FUELED UGHT-DUTY VEHICLES AND LIGHT-DUTY TRUCKS 3,750 LBS. LVW OR LESS NMHC NO, CO Pollutant Emission level* 0.125 GPM 0.2 GPM 1.7 GPM 'Emission levels are expressed in grams per mile (GPM). For vehicles and engines subject to this subsection for purposes of section 202(d) and any reference thereto, the useful life of such vehicles and engines shall be a period of 10 years or 100,000 miles (or the equivalent), whichever first occurs. Such study shall also consider other standards and useful life periods which are more stringent or less stringent than those set forth in table 3 (but more stringent than those referred to in subsections (g)and(h)). "(2)(A) As part of the study under paragraph (1), the Administrator shall examine the need for further reductions in emissions in order to attain or maintain the national ambient air quality standards, taking into consideration the waiver provisions of section 2090)). As part of such study, the Administrator shall also examine— "(i) the availability of technology (including the costs thereof), in the case of lightKluty vehicles and light-duty trucks with a loaded vehicle weight (LVW) of 3,750 lbs. or less, for meeting more stringent emission standards than those provided in subsections (g) and (h) for model years commencing not earlier than after January 1, 2003, and not later than model year 2006, including the lead time and safety and energy impacts of meeting more stringent emission standards; and "(ii) the need for, and cost effectiveness of, obtaining further reductions in emissions from such light-duty vehicles and light-
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