The question is mainly whether such vehicles would meet the terms as a realistic competitor to the conventional internal combustion engine vehicles.
Margir bílaframleiðendur hafa þegar framleitt rafbíla en áhöld eru uppi um hvort slíkir bílar séu raunhæfir keppinautar hinna hefðbundnu bifreiða sem knúnar eru áfram með jarðefnaeldsneyti.