It's 22 pages worth the read. They have not been removed from the Injurious Species List, just to be clear.
"For the foregoing reasons, we affirm the district courtís
judgment and hold as a matter of law that the government lacks
authority under the shipment clause to prohibit shipments of
injurious species between the continental States" http://usark.org/wp-content/uploads/...als-Mem-Op.pdf