Name three authorities to whom tribal representatives answer and briefly describe how each authority holds tribal representatives accountable.

American Indian tribes are sometimes described as "nations within a nation." In fact, some tribes call themselves "nations" or "people" instead of "tribes." Although the tribes are located within the United States, the United States Constitution considers them as separate governments. The term "tribal government" is defined as any Indian tribe, band, nation, or other organized group or community, including any Alaska Native village or regional or village corporation as defined in or established pursuant to the Alaska Native Claims Settlement Act (85 Stat. 688; 43 U. S. C. 1601 et seq.) which is recognized as eligible for the special programs and services provided by the United States to Indians because of their special status as Indians[1]. The tribes have their own laws and governments. Native Americans have significant rights of self governments under the U. S Constitution, which has its root from their own sovereignty.