Exempt GHG emissions analysis for appliances, vehicles, engines

This bill exempts state and local building departments from conducting greenhouse gas emissions analyses for certain appliances, vehicles, and engines under Montana's environmental review process. The exemption applies to products regulated by federal laws that preempt state authority, such as those governed by the Clean Air Act and Energy Policy and Conservation Act, as well as emissions originating outside Montana's borders. By removing these specific sources from environmental review requirements, the bill clarifies that state agencies do not need to assess greenhouse gas impacts for items where federal law already establishes national standards. The legislation also provides instructions for codifying these exemptions into existing state environmental statutes.