Page:United States Statutes at Large Volume 91.djvu/800

 91 STAT. 766

PUBLIC LAW 95-95—AUG. 7, 1977

"Baseline model year."

"(v) For the purpose of this paragraph, the term 'baseline model year' means, with respect to any pollutant emitted from any vehicle or engine, or class or category thereof, the model year immediately preceding the model year in which Federal standards applicable to such vehicle or engine, or class or category thereof, first applied with respect to such pollutant. "(B) During the period of June 1 through December 31, 1979, and during each period of June 1 through December 31 of each third year after 1979, the Administrator may, after notice and opportunity for a public hearing promulgate regulations revising any standard prescribed as provided in subparagraph (A) (ii) for any class or category of heavy-duty vehicles or engines. Such standard shall apply only for the period of three model years beginning four model years after the model year in which such revised standard is promulgated. In revising any standard under this subparagraph for any such three model year period, the Administrator shall determine the maximum degree of emission reduction which can be achieved by means reasonably expected to be available for production of such period and shall prescribe a revised emission standard in accordance with such determination. Such revised standard shall require a reduction of emissions of from any standard which applies in the previous model year. "(C) Action revising any standard for any period may be taken by the Administrator under subparagraph (B) only if he finds— "(i) that compliance with the emission standards otherwise applicable for such model year cannot be achieved by technology, processes, operating methods, or other alternatives reasonably expected to be available for production for such model year without increasing cost or decreasing fuel economy to an excessive and unreasonable degree; and " (ii) the National Academy of Sciences has not, pursuant to its study and investigation under subsection (c), issued a report substantially contrary to the findings of the Administrator under clause (i). "(D) A report shall be made to the Congress with respect to any standard revised under subparagraph (B) which shall contain— "(i) a summary of the health effects found, or believed to be associated with, the pollutant covered by such standard, "(ii) an analysis of the cost-effectiveness of other strategies for attaining and maintaining national ambient air quality standards and carrying out regulations under part C of title I (relating to significant deterioration) in relation to the cost-effectiveness for such purposes of standards which, but for such revision, would apply. "(lii) a summary of the research and development efforts and progress being made by each manufacturer for purposes of meeting the standards promulgated as provided in subparagraph (A) (ii) or, if applicable, subparagraph (E), and "(iv) specific findings as to the relative costs of compliance, and relative fuel economy, which may be expected to result from the application for anj' model year of such revised standard and the application for such model year of the standard, which, but for such revision, would apply. " (E)(i) The Administrator shall conduct a continuing pollutantspecific study concerning the effects of each air pollutant emitted from heavy-duty vehicles or engines and from other sources of mobile source related pollutants on the public health and welfare. The results of such study shall be published in the Federal Register and reported

Standards, triennial revision.

Report to Congress. Contents.

Ante, p. 731.

Pollutant-specific study. Publication in Federal Register and report to Congress.

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