Approval Details

Valid E.O.


This Executive Order approved the specified parts on on February 25, 1975.
As of Thursday, October 21st, 2021 this Executive Order has not been overturned or superceeded.

Approved Parts

1974 and older model year vehicles

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-51
  • Executive Order 51 / D51
  • ARB # D-51
  • Executive Order No: D-51
  • C.A.R.B. No. D-51
  • Resolution D-51
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-51 PDF

D-51 Document:

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