The Environmental Protection Agency has announced a proposed repeal of the 2015 regulation known as the "Clean Power Plan" (officially the Carbon Pollution Emission Guidelines for Existing Stationary Sources: Electric Utility Generating Units). The Clean Power Plan established measures to cut power sector emissions to 32% of 2005 levels by 2030. In a review of the 2015 regulation, initiated by the March 2017 Executive Order 13783, the Environmental Protection Agency found that the Clean Power Plan 'exceeds the Agency's statutory authority', primarily regarding the interpretation of a section of the Clean Air Act that requires the Environmental Protection Agency to establish 'emission guidelines for existing sources that reflect the best system of emission reduction.'
*On November 8, 2017, the Environmental Protection Agency published a notice extending the comment period to January 16, 2018.
*On February 1, 2018, the Environmental Protection Agency published a notice reopening the public comment period until April 26, 2018; this notice also announced three public listening sessions.