Thirteen AGs Filed Petition for Review of EPA's Reversal of Longstanding Clean Air Act 'Once In, Always In' Policy

California Attorney General Xavier Becerra led a coalition of 13 attorneys general in challenging the Trump administration’s rescission of the long-standing “Once In, Always In” policy aimed at securing lasting reductions in emissions of hazardous air pollutants by requiring major sources to keep their emissions controls in place after reducing their emissions levels below major source thresholds.