IHS Markit

In this particular case, the Trump rollback came in the form of two separate rules amending the 2016 rule, explained Hana Vizcarra, staff attorney at the Harvard Law School Environmental and Energy Law Program, in an email to IHS Markit. “In one, the Review Rule, the EPA reinterpreted the Clean Air Act in a way that limited its authority to regulate and, they argued, required them to cut storage and transmission out of the rule entirely. The other, the Reconsideration Rule, dealt with technical aspects of the requirements,” she wrote.