PUBLIC LAW 95-95—AUG. 7, 1977
91 STAT. 7(S5
"(3) Effective on the date of the enactment of this subsection, the regulations of the Administrator under this section respecting fuel additives (40 CFR part 80) shall be deemed amended to comply with the requirement contained in paragraph (2). "(4) Nothing in this section shall be construed to preempt the right of any State to take action as permitted by section 211(c)(4) of this 42 USC 7545. Act.". EMISSION STANDARDS FOR HEAVY DUTY VEHICLES OR ENGINES AND CERTAIN OTHER VEHICLES OR ENGINES
SEC. 224. (a) Section 202(a) of the Clean Air Act is amended by adding the following new paragraph at the end thereof: " (3)(A)(i) The Administrator shall prescribe regulations under paragraph (1) of this subsection applicable to emissions of carbon monoxide, hydrocaibons, and oxides of nitrogen from classes or categories of heavy-duty vehicles or engines manufactured during and after model year 1979. Such regulations applicable to such pollutants from such classes or categories of vehicles or engines manufactured during model years 1979 through 1982 shall contain standards which reflect the greatest degree of emission reduction achievable through the application of technology which the Administrator determines will be available for the model year to which such standards apply, giving appropriate consideration to the cost of applying such technology within the period of time available to manufacturers and to noise, energy, and safety factors associated with the application of such technology. "(ii) Unless a different standard is temporarily promulgated as provided in subparagraph (B) or unless the standard is changed as provided in subparagraph (E), regulations under paragraph (1) of this subsection applicable to emissions from vehicles or engines manufactured during and after model year— " (I) 1983, in the case of hydrocarbons and carbon monoxide, shall contain standards which require a reduction of at least 90 per cent, and " (II) 1985, in the case of oxides of nitrogen, shall contain standards which require a reduction of at least 75 per cent, from the average of the actually measured emissions from heavy-duty gasoline-fueled vehicles or engines, or any class or category thereof, manufactured during the baseline model year. "(iii) The Administrator shall prescribe regulations under paragraph (1) of this subsection applicable to emissions of particulate matter from classes or categories of vehicles manufactured during and after model year 1981 (or during any earlier model year, if practicable). Such regulations shall contain standards which reflect the greatest degree of emission reduction achievable through the application of technology which the Administrator determines will be available for the model year to which such standards apply, giving appropriate consideration to the cost of applying such technology within the period of time available to manufacturers and to noise, energy, and safety factors associated with the application of such technology. Such standards shall be promulgated and shall take effect as expeditiously as practicable taking into account the period necessary for compliance. "(iv) In establishing classes or categories of vehicles or engines for purposes of regulations under this paragraph, the Administrator may base such classes or categories on gross vehicle weight, horsepower, or such other factors as may be appropriate.
42 USC 7521. Regulations. Emission standards for heavy-duty vehicles or engines.
1983 standards for hydrocarbons and carbon monoxide. 1985 standards for oxides of nitrogen. 1981 standards for particulate matter.
Vehicle and engine classes oir categories, criteria.
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