Article XI
The United States agree, whenever the President may think it necessary and proper, to convene such of the tribes, either separately or together, as are interested in the lines left unsettled herein, and to recommend to them an amicable and final adjustment of their respective claims, so that the work, now happily begun, may be consummated. It is agreed, however, that a Council shall be held with the Yancton band of the Sioux, during the year 1826, to explain to them the stipulations of this treaty, and to procure their assent thereto, should they be disposed to give it, and also with the Ottoes, to settle and adjust their title to any of the country claimed by the Sacs, Foxes, and Ioways.