cartechboy writes: California and Tesla have been in a relationship for some time now. The automaker has its headquarters there, its factory, and most of its engineering teams. But it seems the state just slapped Tesla in the face as the California Air Resources Board (CARB) ruled the ability to swap electric-car battery packs doesn't qualify for "fast fueling" incentives. The silicon valley start up loses because it previously had been earning extra "ZEV Gold" credits for this fast-fueling ability which increased its supply of credits that it could sell to other automakers for cash. CARB is accepting public comments on the revised rules through April 18, but don't expect a reversal on this decision. To date, Tesla hasn't reacted favorably when things don't go its way, so now the only question is how will it react to this situation?