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In 2007 the Air Resources Board then adopted a State Implementation Plan (SIP) which requires heavy-duty in-use diesel trucks operating in the South Coast and San Joaquin Valley to be retrofitted to meet model year 2007 emission levels by 2014 and 2017, respectively.
The eight-year exception does not apply to nonresident (previously registered out-of-state) vehicles being registered in California for the first time, diesel vehicles 1998 model or newer and weighing 14,000 lbs or less, [2] [3] or specially constructed vehicles 1976 and newer. [3]
more than 2 model years old to 24 model years old; motorcycles, diesel-powered, and automobiles 25 model years or older exempt from emission testing – includes motor vehicles registered as an Antique or Classic under Texas law (either displaying state-mandated vanity license plate or vintage-era license plates (this also includes past general ...
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State regulators are facing backlash for a proposed regulation to phase out the sale of new diesel trucks by 2040. A future without diesel big rigs? California air board writing new clean-truck rules
California vehicles with 2.5, 2.8 and 3.5 liter engines will have a CLCC system. In 1980 model year, vehicles sold in California and 3.8 and 4.3 liter engines sold federally will have CLCC, and finally in the 1981 model year all passenger cars will have the system. California light and medium duty trucks may also use the c-4 system.
But a federal court last year upheld California's ability to set nation-leading vehicle emissions regulations. The EPA granted California the authority last month to enforce a rule banning the sale of new gas-powered cars in the state by 2035. The EPA did not immediately respond to a request for comment on California withdrawing its waiver ...