This is a NAFTA court they refer to, which this article doesn't explain very well.
http://citizen.typepad.com/eyesontrade/2012/02/will-chevron-case-take-down-trade-pact-investor-state-system.html?utm_source=feedburner&utm_medium=email&utm_campaign=Feed%3A+eyesontrade+%28Eyes+on+Trade%29