Approval Details

Valid E.O.


This Executive Order approved the specified parts on on September 28, 1979.
As of Monday, April 15th, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

1979 and older vehicles, EXCEPT: (1) 1977-1979 Chrysler and Porsche, (2) Chrysler lean burn, (3) Feedback systems vehicles, (4) Three-way catalyst vehiclesRetard timing 50% on pre-75 vehicles requiring premium fuel

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-93
  • Executive Order 93 / D93
  • ARB # D-93
  • Executive Order No: D-93
  • C.A.R.B. No. D-93
  • Resolution D-93
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-93 PDF

D-93 Document:

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