What the Office of Indian Gaming Does: Interior's Role in Tribal Gaming
Often confused with the National Indian Gaming Commission, the Office of Indian Gaming sits inside the Department of the Interior and handles the federal side of compacts and related decisions.
The Office of Indian Gaming is the part of the U.S. Department of the Interior that handles much of the federal government's work on tribal-state gaming compacts. It is named in Federal Register notices, its acting director is listed as the contact for questions, and its work determines how quickly many tribal gaming agreements take effect. Yet the office is far less well known than the National Indian Gaming Commission, and the two are frequently confused. This explainer sets out what the Office of Indian Gaming does, how it fits into the federal structure created by the Indian Gaming Regulatory Act, and why industry participants should know it.
Where the office sits
The Office of Indian Gaming operates within Indian Affairs, the Interior bureau that administers the federal government's relationship with tribal nations. It supports the Assistant Secretary for Indian Affairs, who signs the Federal Register notices announcing compact approvals. A March 2026 notice about the Lac du Flambeau Band's compact amendment, for example, was signed by the Assistant Secretary and listed the Office's acting director as the contact for questions. We describe that notice in our report on the Lac du Flambeau compact amendment.
This placement is the key to understanding the difference between the office and the National Indian Gaming Commission. The NIGC is the independent federal regulatory body created by IGRA in 1988 to oversee Indian gaming, review tribal gaming ordinances, approve management contracts and enforce federal regulations. The Office of Indian Gaming, by contrast, is part of the Secretary of the Interior's apparatus. IGRA gives certain functions to the Secretary and others to the Commission, and the two bodies operate side by side. Our explainer on how the NIGC regulates tribal gaming covers the commission's side of the ledger.
Compact review
The office's best-known function is supporting the Secretary's review of Class III compacts and amendments. Under IGRA, a compact between a tribe and a state does not take effect until the Secretary approves it and notice is published in the Federal Register. The Secretary has 45 days to act. If the Secretary neither approves nor disapproves within that period, the compact is considered approved to the extent it is consistent with IGRA, and notice is published. The Interior regulations at 25 CFR 293.4 provide that the Secretary must review and approve all compacts and amendments.
The Secretary's authority to disapprove is limited to specific grounds: that the compact violates IGRA, that it violates another provision of federal law that does not relate to jurisdiction over gaming on Indian lands, or that it violates the trust obligations of the United States to Indians. Within those boundaries, the office's staff review submissions, coordinate with other parts of the department, including legal counsel, and prepare the decisions or notices that follow. The balance between approval, disapproval and deemed approval is the subject of our analysis of operation-of-law approvals.
Publication and public record
A second function is the preparation of Federal Register notices. Because a compact or amendment takes effect only on publication, the notice is the public record that the agreement is in force. These notices are short and formulaic, but they carry the details that matter: the tribe and state, the effective date and, in the case of a deemed approval, the statutory basis. The office's contact information appears in the notice so tribes, states and members of the public can ask questions. Our guide to reading a Federal Register compact notice explains how to interpret them.
Other functions
Beyond compact review, the Interior Department has responsibilities under IGRA that the office typically supports. When a tribe and a state fail to reach a compact, a pathway exists under federal regulations for the Secretary to prescribe procedures for Class III gaming, a subject we explain in our piece on secretarial procedures. When a tribe seeks to game on land acquired after IGRA's enactment, questions of whether the land qualifies, and whether an exception or a two-part determination applies, involve the department as well. Our explainer on the two-part determination describes that process. These land and procedures decisions often involve several offices across Interior, so readers should treat any description of which office does what as a general outline rather than an organizational chart.
Why it matters to the industry
For tribes, states and investors, the office matters because its timelines affect real projects. A compact amendment that adds games, extends a term or changes payments cannot be implemented until it takes effect. If the department acts quickly, a tribe may move ahead on schedule; if the 45-day period runs out, the amendment takes effect by default. Either way, the office is the government contact that shapes the outcome.
It also matters for transparency. The Federal Register notices the office helps prepare are among the few public indicators of how many compacts are being amended, which tribes are negotiating, and how often the department elects not to act. Researchers and journalists who track compact activity rely on them. For a broader view of how federal pieces fit together, our explainer on how a new tribal casino gets approved shows where the office appears in the larger sequence, and the Legal Guide provides the statutory background.
Anyone needing to contact the office about a specific compact should consult the current contact details in the most recent Federal Register notice or on the Indian Affairs website, since personnel and addresses change. Understanding the distinction between the Office of Indian Gaming and the NIGC is a useful first step for anyone entering the field: one handles the Secretary's compact responsibilities inside Interior, and the other is the independent regulator charged with enforcing IGRA's gaming rules.