Approval Details

Valid E.O.


This Executive Order approved the specified parts on on March 11, 1993.
As of Sunday, July 21st, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

1993 and older model-year vehicles with diesel engines

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-311
  • Executive Order 311 / D311
  • ARB # D-311
  • Executive Order No: D-311
  • C.A.R.B. No. D-311
  • Resolution D-311
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-311 PDF

D-311 Document:

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