[15] Grand River Enterprises Six Nations Ltd. et al. v. The United States of America, UNCITRAL award, 12 January 2011, §71: “The Tribunal understands the obligation to “take into account” other rules of international law to require it to respect the Vienna Convention’s rules governing treaty interpretation. However, the Tribunal does not understand this obligation to provide a license to import into NAFTA legal elements from other treaties, or to allow alteration of an interpretation established through the normal interpretive processes of the Vienna Convention. This is a Tribunal of limited jurisdiction; it has no mandate to decide claims based on treaties other than NAFTA. … The Tribunal is particularly mindful in this regard of the Free Trade Commission’s directive that a violation of an obligation under another treaty does not give rise to a breach of Article 1105.”