PUBLIC LAW 101-549—NOV. 15, 1990 104 STAT. 2477 duty trucks, taking into consideration alternative means of attaining or maintaining the national primary ambient air quality standards pursuant to State implementation plans and other requirements of this Act, including their feasibility and cost effectiveness. "(B) The Administrator shall submit a report to Congress no later Reports, than June 1, 1997, containing the results of the study under this subsection, including the results of the examination conducted under subparagraph (A). Before submittal of such report the Administrator shall provide a reasonable opportunity for public comment and shall include a summary of such comments in the report to Congress. "(3)(A) Bas^ on the study under paragraph (1) the Administrator Regulations, shall determine, by rule, within 3 calendar years after the report is submitted to Congress, but not later than December 31, 1999, whether— "(i) there is a need for further reductions in emissions as provided in paragraph (2)(A); "(ii) the technology for meeting more stringent emission standards will be available, as provided in paragraph (2)(A)(i), in the case of light-duty vehicles and light-duty trucks with a loaded vehicle weight (LVW) of 3,750 lbs. or less, for model years commencing not earlier than January 1, 2003, and not later than model year 2006, considering the factors listed in paragraph (2)(A)(i); and "(iii) obtaining further reductions in emissions from such vehicles will be needed and cost effective, taking into consideration alternatives as provided in paragraph (2)(A)(ii). The rulemaking under this paragraph shall commence within 3 months after submission of the report to Congress under paragraph (2)(B). "(B) If the Administrator determines under subparagraph (A) that— "(i) there is no need for further reductions in emissions as provided in paragraph (2)(A); "(ii) the technology for meeting more stringent emission standards will not be available as provided in paragraph (2)(A)(i), in the case of light-duty vehicles and light-duty trucks with a loaded vehicle weight (LVW) of 3,750 lbs. or less, for model years commencing not earlier than January 1, 2003, and not later than model year 2006, considering the factors listed in paragraph (2)(A)(i); or "(iii) obtaining further reductions in emissions from such vehicles will not be needed or cost effective, taking into consideration alternatives as provided in paragraph (2)(A)(ii), the Administrator shall not promulgate more stringent standards than those in effect pursuant to subsections (g) and (h). Nothing in this paragraph shall prohibit the Administrator from exercising the Administrator's authority under subsection (a) to promulgate more stringent standards for light-duty vehicles and light-duty trucks with a loaded vehicle weight (LVW) of 3,750 lbs. or less at any other time thereafter in accordance with subsection (a). "(C) If the Administrator determines under subparagraph (A) that— "(i) there is a need for further reductions provided in paragraph (2)(A); in emissions as 89-194O-91-6:QL3Part4
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