Approval Details

Valid E.O.


This Executive Order approved the specified parts on on January 11, 1974.
As of Sunday, July 21st, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

1966-1974 AMC, Ford and GM with V8, EXCEPT: (1) Vehicles with OE electronic ignition, (2) 1966-70 vehicles with NOx device

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-21
  • Executive Order 21 / D21
  • ARB # D-21
  • Executive Order No: D-21
  • C.A.R.B. No. D-21
  • Resolution D-21
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-21 PDF

D-21 Document:

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