Validity
As of Friday, May 2nd, 2025 this Executive Order has not been overturned or superceeded. Warning: This Executive Order record has not yet been synced with arb.parts system.
Executive Order F-57
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Approved Auxiliary Fuel Tanks
The California Air Resource Board requires manufacturers of auxiliary fuel tanks to obtain approval of their tanks before they can be sold or installed in California vehicles. Fuel tank manufacturers are required to update their approval if they wish to include newer model-year vehicles.
The Air Resource Board does not verify compliance of an auxiliary fuel tank with applicable federal and state safety regulations. Compliance with safety laws and regulations remains the responsibility of the fuel tank manufacturer.
View Executive Order Document [PDF]