Air Pollution Control System or Device

19VAC30-70-310. Air pollution control system or device.
A. No motor vehicle manufactured for the model year 1973 or for subsequent model years
shall be operated on the highways of this Commonwealth unless it is equipped with an air
pollution control system or device, or combination of such systems or devices installed in
accordance with federal laws and regulations.
B. The provisions of this section shall not prohibit or prevent shop adjustments or
replacements of equipment for maintenance or repair or the conversion of engines to low
polluting fuels, such as, but not limited to, natural gas or propane, so long as such action does
not degrade in any manner or to any degree the anti- pollution capabilities of the vehicle power
system.
C. Inspect for and reject if:

  • 1. The air pollution control system or device on motor vehicles manufactured for the
    model year 1973 or for subsequent model years has been removed or otherwise
    rendered inoperable. The conversion of an engine to utilize low polluting fuels such as
    natural gas or propane may result in the removal of some part of the pollution control
    system; however, if the engine is converted to utilize both low polluting fuels and/or

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Revised August 1, 2012

19VAC30-70 – Motor Vehicle Safety Inspection Rules And Regulations

  • gasoline no part of the pollution control system or device can be removed or otherwise
    rendered inoperable.
  • 2. Any of the essential parts of the pollution control system or devices on vehicles
    manufactured for the model year 1973 or for subsequent model years have been
    removed, rendered inoperative or disconnected. This includes any belt, valve, pump,
    hose line, cap, cannister, catalytic converter and the restrictor in the gasoline tank filler
    neck on vehicles required to use unleaded fuel.
    NOTE: In order to determine if a motor vehicle was originally equipped with emissions
    control equipment, refer to the vehicle’s emissions control information label which is
    usually located in the engine compartment.
  • 3. The emission control system or device on motor vehicles manufactured for the model
    year 1973 or for subsequent model years is not comparable to that designed for use
    upon the particular vehicle as standard factory equipment.
    Any new or used after market catalytic converter installed on a vehicle after December
    31, 1987, shall meet and be installed in accordance with specifications established by
    the Environmental Protection Agency. A catalytic converter so installed shall be
    identified with a visible, permanent, non-destructible label or stamp which will identify the
    manufacturer, vehicle application and month and year of manufacture. The label shall be
    in accordance with the following format:

    • a. New converters – NIXXNYYY /ZZZZ
    • b. Used converters – UIXXNYYY/ZZZZ
    • N – New converter designation
    • U – Used converter designation
    • XX- Manufacturer code issued by EPA
    • YYYY – Numerical designation of vehicle application
    • ZZZZ- Month and year of manufacture (i.e. – 0188 for January, 1988)