Approval Details

Valid E.O.


This Executive Order approved the specified parts on on October 18, 1979.
As of Thursday, September 28th, 2023 this Executive Order has not been overturned or superceeded.

Approved Parts

1979 and older vehicles equipped with conventional gasoline engines, EXCEPT: (1) Vehicles with rotary engines, (2) Fuel injected vehicles, (3) Vehicles with 4 cylinder engines

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-91
  • Executive Order 91 / D91
  • ARB # D-91
  • Executive Order No: D-91
  • C.A.R.B. No. D-91
  • Resolution D-91
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-91 PDF

D-91 Document:

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