Approval Details

Valid E.O.


This Executive Order approved the specified parts on on August 10, 1993.
As of Sunday, July 14th, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

Part NumberModels
1200T1993 and older model-year heavy-duty diesel fueled engines

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-312
  • Executive Order 312 / D312
  • ARB # D-312
  • Executive Order No: D-312
  • C.A.R.B. No. D-312
  • Resolution D-312
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-312 PDF

D-312 Document:

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