Indian Gaming is regulated through a three-layer system:
Tribal Gaming Commissions
Tribal governments license employees, enforce gaming ordinances, conduct audits, and ensure compliance.
State Oversight (Class III)
States participate through tribal-state compacts that define authorized games, regulatory cooperation, and revenue-sharing terms.
National Indian Gaming Commission (NIGC)
The NIGC provides federal oversight, reviews tribal ordinances, conducts audits, and enforces Minimum Internal Control Standards (MICS).
Indian gaming is authorized by the U.S. Indian Gaming Regulatory Act (IGRA). Under this law Indian tribes in any state can conduct gambling on Indian land as long as the type of gambling has been authorized for non-Indians.
The IGRA defines "Indian land" as either (1) land that is part of a federally recognized Indian reservation, or (2) off-reservation land that is held in trust for a tribe by the federal government.

New tribal casinos require an extensive evaluation process within the U.S. Department of Interior before a final decision is made regarding approval. The process sometimes takes several years. The department agency that plays the lead role in the process is the Bureau of Indian Affairs (BIA).
Approval Steps for New Casinos
Tribal Application
To start the approval process, tribal governments must first pass a resolution stating its intent to develop a casino. The tribe will then submit a formal application to the BIA for approval of the casino.
BIA Eligibility Review
The BIA ensures the application complies with the requirements of the Indian Gaming Regulatory Act (IGRA). The tribe must be federally recognized, the casino location must be on Indian lands, and the games must not be prohibited by federal law.
Off-Reservation Land
If the casino site is on land acquired by the tribe after 1988, the Secretary of the Interior must consult with the state governor and local officials to determine the potential impacts on the local community and on other tribes. The Secretary must weigh that against the potential economic benefits to the tribal applicant, its need for additional land, and its history of self-governance.
Key steps include:
National Environmental Policy Act (NEPA) Review
The BIA conducts an environmental review with an Environmental Assessment (EA) or Environmental Impact Statement (EIS), followed by a public comment period.
Land-into-Trust Application (Off-Reservation)
If the casino site is not on tribal land, the tribe must file a land-into-trust application to the BIA.
Tribal-State Compact
For Class III gaming casinos, the tribe and the state must negotiate a gaming compact to establish the operating terms for the casino, such as types and number of games.
Final Approval
When the above steps are completed, the BIA issues a final decision on the casino application. The Secretary of Interior signs the approval letter.
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