Tag Archives: “Arizona v. EPA”

In Cooperative Federalism, Who Gets Deference, EPA or the States? Can you say “Federal Supremacy”?

Earlier this week, the 9th Circuit denied Arizona’s challenge to EPA’s decision to reject Arizona’s SIP addressing regional haze grand canyonrequirements and instead promulgate its own federal implementation plan.  The decision has a number of interesting elements and is well worth a read, but it’s most notable for its treatment of the deference issue.

We all know that courts defer to reasonable agency decision-making. … More