In this chapter:

1.    “Public agency” means any political subdivision, including municipalities, counties, school districts, and any agency or department of North Dakota.

2.    “Secretary” means the secretary of interior of the United States.

3.    “Tribal government” means the officially recognized government of any Indian tribe, nation, or other organized group or community located in North Dakota exercising self-government powers and recognized as eligible for services provided by the United States. The term does not include any entity owned, organized, or chartered by a tribe which exists as a separate entity authorized by a tribe to enter agreements of any kind without further approval by the government of the tribe.