Rules that effectively require electric-car production in California stayed on the books after air regulators deadlocked over how to switch their focus to fuel-cell vehicles that are years away from rolling off the assembly line, Associated Press (AP) reported. AP said the state's Air Resources Board could not reach a decision last Friday on changing its zero emissions vehicle rule after members of the public and many interest groups urged it not to abandon the strict quota for clean cars it set 13 years ago. The board planned to revisit the issue next month.