The Blog for Clean Air has discovered draft legislation by Rep. Rick Boucher (D-VA) which would prevent states from developing greenhouse gas emission regulations. California and other states are waiting for word from EPA on whether they may institute their own tailpipe emissions programs. Boucher's legislation would stop states' efforts dead in their tracks. The Clean Air Act includes language specifically forbidding states from pursuing emissions regulations for motor vehicles but does provide a caveat allowing EPA to grant waivers. Boucher's legislation would not eliminate waivers, but it would amend the Clean Air Act to read as follows: No such waiver shall be granted if the [EPA] Administrator finds that such State standards are designed to reduce greenhouse gas emissions. By now, those of us with common sense are used to seeing greenhouse gas regulation halted by way of delay and scientific manipulation. But to halt regulation through statute in such an explicit way is shocking.