Section 81 Contracts for Tribal Programs

The development deal looked solid. The tribe had partnered with an experienced developer, the financing was in place, and construction was ready to begin. Then someone noticed the lease term was fifteen years and the project involved trust land. The contract required BIA approval under Section 81—approval that no one had sought. Everything stopped while parties scrambled to determine whether the deal could be saved.

Section 81 of Title 25 (25 U.S.C. § 81) is one of those federal requirements that catches parties by surprise. It requires Secretarial approval for certain contracts that encumber Indian lands for seven or more years. Its purpose is protective: to ensure that tribes are not bound by certain long-term land encumbrances without federal oversight. But its effect is practical: a contract requiring approval is not valid until approved. Understanding how tribal sovereignty interacts with these federal approval requirements is essential for anyone doing business with tribes.

What Section 81 Requires

Section 81 requires approval from the Secretary of the Interior (delegated to the Bureau of Indian Affairs) for a covered contract that encumbers Indian lands for a period of seven or more years. The statute applies to trust and restricted lands - lands held by the United States in trust for tribes or subject to restrictions on alienation.

The key elements are:

Indian lands. The contract must involve trust or restricted land. Fee simple land owned by tribes is not subject to Section 81. Determining land status requires title research; not all land within reservation boundaries is trust land.

Encumbrance. The contract must encumber the land. Under 25 C.F.R. Part 84, that can include a claim, lien, charge, right of entry, liability attached to land, or an arrangement giving exclusive or nearly exclusive proprietary control over tribal land.

Seven or more years. The encumbrance must last for at least seven years. Shorter-term agreements fall outside Section 81's scope, though they may still require approval under other authorities (such as leasing regulations).

When all three elements are present, the contract requires BIA approval before it becomes enforceable.

What to Check Before a Tribal Program Contract

The current Part 84 regulations make the Section 81 screen more precise than "tribal contract equals federal approval." The core questions are whether the tribe is a party, whether tribal lands are involved, whether the contract creates an encumbrance as the regulations define that term, and whether the encumbrance lasts seven or more years.

Part 84 also matters because it identifies contracts that do not require Section 81 approval, including contracts already reviewed or approved under another federal law, certain leases and rights-of-way governed by separate approval regimes, attorney contracts, Indian Self-Determination and Education Assistance Act contracts, self-governance agreements, and Indian Gaming Regulatory Act contracts or agreements subject to National Indian Gaming Commission approval.

For contracts that do require approval, the regulations say the contract is not valid until approved. They also identify provisions that matter during review, including remedies for breach and language addressing tribal sovereign immunity, either by disclosing the immunity defense through tribal law or court ruling, or by including an express waiver where the tribe chooses to provide one.

Arrangements That Require a Section 81 Check

The most common Section 81 questions involve long-term land-facing arrangements:

Long-term proprietary-control arrangements. A management, development, or operating agreement can trigger Section 81 analysis if it gives the outside party exclusive or nearly exclusive control over tribal land for seven or more years.

Contracts not already approved elsewhere. If the transaction is already reviewed and approved under another federal law - for example, many leases and rights-of-way have separate regulatory pathways - Part 84 may exempt it from Section 81 approval. That exemption does not mean no federal approval is needed; it means the approval question may live under a different set of rules.

Development agreements. Comprehensive development arrangements that commit tribal land to a particular use over an extended period deserve early Section 81 analysis, especially when the contract term, renewal rights, financing documents, site control, or operational control approach the seven-year threshold.

Joint venture interests. If a joint venture structure creates an encumbrance on tribal land lasting seven or more years, Section 81 may apply—even if the arrangement is structured as something other than a traditional lease.

The question is always functional: does the arrangement create an encumbrance on Indian lands lasting seven or more years? If yes, approval is required regardless of what the parties call it.

Contracts That Don't Require Approval

Section 81 doesn't apply to everything:

Contracts not involving land. Employment contracts, service agreements, equipment purchases, supply contracts, and other arrangements that don't encumber tribal land fall outside Section 81. A tribe can contract for legal services, construction work, or commodity purchases without BIA approval (unless other regulations apply).

Fee land. Contracts involving land owned by tribes in fee simple, rather than trust or restricted status, don't require Section 81 approval. This is one reason tribes sometimes take land into fee ownership for commercial purposes—to avoid federal approval requirements.

Short-term arrangements. Encumbrances lasting less than seven years are outside Section 81's scope. Month-to-month leases, short-term permits, and temporary use agreements don't require approval. However, structuring an intended long-term arrangement as a series of short-term renewals to avoid Section 81 may not succeed; the BIA and courts look at substance over form.

Certain contracts exempted by regulation. The BIA's implementing regulations (25 C.F.R. Part 84) exempt multiple categories from Section 81 approval, including contracts subject to other federal approval regimes, attorney contracts, Indian Self-Determination and Education Assistance Act contracts, self-governance agreements, and certain gaming-related contracts approved under separate law.

The Consequence of Non-Compliance

The core risk of Section 81 noncompliance is voidness. An unapproved contract that requires approval may be void and unenforceable. This isn't merely a procedural defect that can be cured; it goes to the existence of the contract itself. The intersection of tribal immunity and contract voidness can leave non-tribal parties in an especially difficult position, with no enforceable agreement and no ability to sue the tribe for restitution.

For non-tribal parties, this is serious. A developer who builds on trust land under an unapproved lease may find that the lease is void. The tribe could potentially claim the improvements without paying for them. The developer's investment—potentially millions of dollars—could be lost with no legal remedy.

Courts have applied this principle rigorously. In Pueblo of Santa Ana v. Kelly, the Tenth Circuit held that an unapproved lease was void ab initio, leaving the non-tribal party without recourse even after years of performance. The protective purpose of Section 81—ensuring BIA oversight of long-term encumbrances—requires strict enforcement.

The practical lesson: verify approval requirements before substantial performance. Once money has been spent and improvements built, discovering that the underlying contract is void creates problems that may be impossible to solve.

The Approval Process

BIA approval involves several steps:

Submission. The parties prepare the contract and submit it to the appropriate BIA regional office. The submission should include the contract itself, documentation of tribal authority to enter the contract, and any supporting materials the BIA may require.

Review. The BIA reviews the contract for compliance with applicable law and regulations. This includes determining whether the contract terms are in the tribe's interest, whether required consents have been obtained, and whether the encumbrance is appropriate.

Approval or objection. The BIA either approves the contract or raises objections. If objections are raised, parties may revise the contract and resubmit. The BIA cannot unilaterally modify contract terms—approval is yes or no—but it can indicate what changes would enable approval.

Timing. The approval process takes time. Building BIA review, exemption analysis, and land-status verification into transaction timelines prevents delays. Deals that assume instant approval often fail when approval takes longer than expected.

Protecting Tribal Programs and Partners

Section 81 compliance protects both tribes and their partners. From the tribal perspective, BIA review provides an additional check on long-term encumbrances that might otherwise disadvantage the tribe. From the partner's perspective, proper approval ensures the contract is enforceable—that the investment is protected by a valid agreement.

Good practice includes:

Land status verification. Before negotiating long-term arrangements, verify whether the land is trust, restricted, or fee. This determines whether Section 81 applies. Our guide to tribal business formation explains how different entity structures and land statuses affect compliance obligations.

Duration planning. If Section 81 would apply, consider whether the business purpose requires a term of seven years or more. Shorter terms avoid approval requirements, though they may not serve commercial needs.

Approval timeline integration. Build BIA review into transaction schedules. Closings should be conditioned on BIA approval, and timelines should allow for review periods.

Tribal authorization documentation. Ensure that the tribe has properly authorized entry into the contract—typically by tribal council resolution—and that documentation is prepared for BIA submission.

Compliance confirmation. Before substantial performance, confirm that all required approvals have been obtained. Don't rely on assumptions; verify.

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Frequently Asked Questions

Who is responsible for obtaining Section 81 approval?

Typically both parties have an interest in ensuring the contract is approved; an unapproved contract is unenforceable by either side. As a practical matter, the tribe often takes the lead in BIA communications because of its existing relationship with the agency.

How long does BIA approval take?

Timelines vary depending on the office, the complexity of the contract, land-status issues, and whether the parties first need a determination that Section 81 approval is not required. Build review time into the deal schedule rather than treating approval as a closing-day formality.

Does BIA approve contracts that do not require Section 81 approval?

Generally no. Under 25 C.F.R. § 84.005, if the Secretary receives a final executed contract that does not require approval under Part 84, the agency returns it with an explanation that no approval is required. That is different from approving the contract on the merits.

Can parties proceed before approval is obtained?

Proceeding before approval is risky. If approval isn't obtained, performance may not create enforceable rights. Some parties include conditions that allow termination if approval isn't obtained by a certain date.

What if the BIA objects to contract terms?

Objections typically identify specific concerns. Parties can revise the contract to address those concerns and resubmit. The BIA cannot rewrite the contract, but negotiation often resolves objectionable provisions.

Does Section 81 apply to gaming compacts?

Gaming compacts between tribes and states are approved under separate authority (IGRA) and aren't subject to Section 81. However, related development agreements or leases for gaming facilities may require Section 81 approval.

What happens to an unapproved contract?

An unapproved contract that required approval is void. Performance under it may not create enforceable rights. Parties who have performed may seek equitable remedies, but recovery is uncertain.

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This article was materially updated on June 13, 2026, using 25 U.S.C. § 81 and the current eCFR text of 25 C.F.R. Part 84. It is for general information only and is not legal advice. Section 81 analysis requires case-specific review of land status, contract terms, and applicable regulations.