California regulators are pushing a mandate that could have zero emission vehicles making up 5.5% of new car sales by 2018, increasing to 14% by 2025. The proposal is being rejected by auto makers who feel the plan is the first step into establishing new national fuel efficiency standards that could end up costing them $5,000 for every vehicle that does not meet the standard. According to the Association of Global Automakers (AGA) the requirement of electric vehicles would interfere with auto makers ability to meet the new fuel economy and emissions standards being proposed by the Obama administration. They feel that auto makers will be forced into building vehicles that are not in demand, into an infrastructure that can not meet their refueling needs. It is expected the plan would hit smaller auto companies the worst, because they have fewer resources and development advances for electric vehicles.