551 U.S. 644 (2007)
The case National Association of Home Builders v. Defenders of Wildlife addresses the interplay between two significant federal statutes: the Clean Water Act and the Endangered Species Act (ESA).
Does the Endangered Species Act's consultation requirement apply to EPA's decision to transfer permitting authority to a state when EPA has limited discretion in the matter?
The Endangered Species Act mandates federal agencies to consult with wildlife agencies to ensure their actions do not jeopardize endangered species, yet this applies only when the agency has discretionary authority in its actions.
The Supreme Court held that the Endangered Species Act's consultation requirements do not apply where an agency is mandated by statute to act in a specific manner, without discretion.
This case is critical for law students studying the limits of federal agency authority and statutory interpretation. It showcases the importance of understanding how statutory mandates can intersect and the circumstances under which one statute may constrain the regulatory application of another. Moreover, it highlights the limitations of environmental protections when regulatory discretion is statutorily curtailed.