Approval Details

Valid E.O.


This Executive Order approved the specified parts on on March 8, 1976.
As of Wednesday, June 19th, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

1974 and older vehicles with 12 volt negative ground battery, EXCEPT: (1) 1973-1974 Mercedes-Benz, Mazda, Audi, Porsche, (2) GM with coil integrated into distributor, (3) 1966-1970 vehicles with Dana or Carter NOx device using an electronic speed sensor

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-20-4
  • Executive Order 20-4 / D20-4
  • ARB # D-20-4
  • Executive Order No: D-20-4
  • C.A.R.B. No. D-20-4
  • Resolution D-20-4
For Free CARB Executive Order Status verification, email an image of the device Executive Order label as well as the Year/Make/Model and Test Group # of the vehicle to [email protected]

Download: Executive Order D-20-4 PDF

D-20-4 Document:

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