Approval Details

Valid E.O.


This Executive Order approved the specified parts on on February 15, 2008.
As of Wednesday, June 19th, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModelsModification
Aero-Nox2008 and older model year diesel powered vehicles.None

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-631
  • Executive Order 631 / D631
  • ARB # D-631
  • Executive Order No: D-631
  • C.A.R.B. No. D-631
  • Resolution D-631
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-631 PDF

D-631 Document:

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