PUBLIC LAW 101-549—NOV. 15, 1990 104 STAT. 2503 SEC. 223. NEW TITLE II DEFINITIONS. (a) ADDITIONAL DEFINITIONS.— Section 216 of the Clean Air Act (42 U.S.C. 7550) is amended by adding the following at the end thereof: " i V VEHICLE CURB WEIGHT, GROSS VEHICLE WEIGHT RATING, LIGHT-DUTY TRUCK, UGHT-DUTY VEHICLE, AND LOADED VEHICLE WEIGHT.—The terms 'vehicle curb weight', 'gross vehicle weight rating' (GVWR), 'light-duty truck' (LDT), light-duty vehicle, and 'loaded vehicle weight' (LVW) have the meaning provided in regulations promulgated by the Administrator and in effect as of the enactment of the Clean Air Act Amendments of 1990. The abbreviations in parentheses corresponding to any term referred to in this paragraph shall have the same meaning as the corresponding term. "(8) TEST WEIGHT.—The term 'test weight' and the abbreviation 'tw' mean the vehicle curb weight added to the gross vehicle weight rating (gvwr) and divided by 2. " (9) MOTOR VEHICLE OR ENGINE PART MANUFACTURER. — The term 'motor vehicle or engine part manufacturer' as used in sections 207 and 208 means any person engaged in the manufacturing, assembling or rebuilding of any device, system, part, component or element of design which is installed in or on motor vehicles or motor vehicle engines. "(10) NoNROAD ENGINE. —The term 'nonroad engine' means an internal combustion engine (including the fuel system) that is not used in a motor vehicle or a vehicle used solely for competition, or that is not subject to standards promulgated under section 111 or section 202. " (11) NoNROAD VEHICLE.— The term 'nonroad vehicle' means a vehicle that is powered by a nonroad engine and that is not a motor vehicle or a vehicle used solely for competition.". (b) DEFINITION OF MANUFACTURER.—Paragraph (1) of section 216 of the Clean Air Act (42 U.S.C. 7550) is amended by striking out "new motor vehicles or new motor vehicle engines" every place it occurs and inserting "new motor vehicles, new motor vehicle engines, new nonroad vehicles or new nonroad engines". SEC. 224. HIGH ALTITUDE TESTING. Section 215 of the Clean Air Act (42 U.S.C. 7549) is amended by adding the following at the end thereof: "(e) HIGH ALTITUDE TESTING. —(1) The Administrator shall promptly establish at least one testing center (in addition to the testing centers existing on the date of the enactment of the Clean Air Act Amendments of 1990) located at a site that represents high altitude conditions, to ascertain in a reasonable manner whether, when in actual use throughout their useful life (as determined under section 202(d)), each class or category of vehicle and engines to which regulations under section 202 apply fconforms to the emissions standards established by such regulations. For purposes of this subsection, the term 'high altitude conditions' refers to high altitude as defined in regulations of the Administrator in effect as of the date of the enactment of the Clean Air Act Amendments of 1990. "(2) The Administrator, in cooperation with the Secretary of Establishment Energy and the Administrator of the Urban Mass Transportation Administration, and such other agencies as the Administrator deems appropriate, shall establish a research and technology assessment center to provide for the development and evaluation of lesspolluting heavy-duty engines and fuels for use in buses, heavy-duty Motor vehicles. Establishment.
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