While it makes sense to offer some exemptions to low volume automakers like Ferrari and Lotus, the federal threshold of 10,000 sales makes more sense than 60,000 in California alone. Leaving a hole like that just provides a means for companies that come in just below the limit to game the system by withholding certain models for sale in the state. Then there is the issue of all the other states that want to follow California's lead. Will they set different thresholds or exempt manufacturers based on their sales in California? Given that markets are not uniform across the country, this could get very messy, very quickly. Consumers in certain states might be able to by certain models that neighboring states could not. If Congress wants to support California's standards, they should just adopt it as a federal standard instead of grandstanding by passing legislation forcing the EPA to grant a waiver to the state.
[Source: Detroit Free Press]