California regulators are proposing a longer phase-in for their new greenhouse gas emission standards than had been expected. A 30 percent cut in vehicle emissions would be required by the 2016 model year, rather than 2014, according to a notice made public last Friday.
The California Air Resources Board is likely to adopt the rules next month. It would require more emissions reductions from cars and small trucks and less from larger trucks than a draft plan would have.
Automakers generally oppose the California effort as a veiled attempt to regulate fuel economy. They say only the federal government has that authority.