Corey v. Rocky Mountain Farmers Union

Issue: (1) Whether Section 211(c)(4)(B) of the Clean Air Act, 42 U.S.C. " 7545(c)(4)(B), which authorizes California to prescribe emissions controls with respect to "any fuel" "at any time," bars some or all of petitioners' dormant commerce clause challenges to California's Low Carbon Fuel Standard; and (2) whether petitioners' challenges, in 13-1149, to the treatment of 2011 California crude oil sales, including the challenge remanded to the district court, are moot, where the challenged regulatory provisions were never actually applied to petitioners or others and have been superseded by substantially different provisions.