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DC Circuit Vacates Trump s Ace Rule and Deals Biden s EPA New Hand for Regulating Power Plant Greenhouse Gas Emissions Tuesday, January 26, 2021
On 19 January 2021, the eve of inauguration for the Biden Administration, the United States Court of Appeals for the District of Columbia Circuit (D.C. Circuit) struck down the Affordable Clean Energy Rule (ACE Rule).
1 Issued under the Trump Administration’s Environmental Protection Agency (EPA), the ACE Rule repealed and replaced the formerly enacted Clean Power Plan (CPP)
2 and sought to establish a more narrowly defined framework for the regulation of power plant greenhouse gas (GHG) emissions.
3 As a premise for the ACE Rule, the Trump EPA argued that Section 111 of the Clean Air Act (CAA), codified at 42 U.S.C. § 7411, contains clear and unambiguous language limiting the EPA’s emission reduction measures to improvements “at” and “to” existing GHG emissions sources.