Approval Details

Valid E.O.


This Executive Order approved the specified parts on on May 8, 1975.
As of Monday, May 27th, 2024 this Executive Order has not been overturned or superceeded.

Approved Parts

1975 and older model year vehicles except: 1) Those vehicles equipped with General Motors 6 cylinder engines. 2) Those vehicles equipped with Chrysler Corporation 6 or 8 cylinder engines. 3) Those vehicles equipped with Ford 8 cylinder engines. 4) Those vehicles originally equipped with breakerless ignition systems or dual point ignition systems where one of the points are used to retard timing for emission control. 5) Those 1966 throught 1970 vehicles equipped with "NOx retrofit devices" with a 4" retard in basic ignition timing (i.e., Carter, Echlin, STP Air Computer, Pure Power - Electro-Nox).

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-47
  • Executive Order 47 / D47
  • ARB # D-47
  • Executive Order No: D-47
  • C.A.R.B. No. D-47
  • Resolution D-47
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-47 PDF

D-47 Document:

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