The executive branch must follow administrative law when writing and issuing regulations. The Obama administration followed the law which required giving notice in the Federal Register of rule making, of opportunity to comment, of draft rules, opportunity to comment, and then notice of the response to comments and the final rule and the date it goes into effect. The court rules the EPA had complied with the law, thus the Pruitt EPA must follow the same procedures of giving notice, accepting comments,,etc to change the Obama EPA rules. These procedures typically take two yearseparate, or more when controversy exists.

Pruitt sued the EPA based on the administrative procedures act not being followed in a number of cases, so he does not get a pass allowing him to ignore those laws he sued under.

Live by the sword, die by the sword of administrative procedures law.