NAGPRA — Native American Graves Protection and Repatriation Act

For over a century, American museums, universities, and federal agencies accumulated hundreds of thousands of Native American human remains, sacred objects, and culturally significant items — often taken from burial sites without consent, sometimes during military campaigns or excavations, occasionally through legal purchase but without meaningful tribal participation. The Native American Graves Protection and Repatriation Act (NAGPRA), enacted in 1990, addresses this legacy by requiring federal agencies and federally-funded museums to inventory these holdings, identify their cultural affiliation, and return them to lineal descendants and culturally affiliated tribes on request. NAGPRA also protects newly discovered Native American cultural items on federal and tribal land — establishing that tribes, not discoverers or federal agencies, are the rightful owners. More than 30 years after passage, repatriation continues: tens of thousands of items have been returned, and hundreds of thousands more remain in collections awaiting documentation, consultation, and transfer.

Current Law (2026)

Legal Authority

• 25 U.S.C. § 3001 — Definitions: "cultural affiliation" means a relationship of shared group identity traceable between a present-day tribe or Native Hawaiian organization and an identifiable earlier group; "cultural patrimony" means objects with ongoing historical, traditional, or cultural importance central to the Native American group, rather than being the individual property of a specific person; "sacred objects" means items needed by traditional Native American religious leaders for the practice of traditional Native American religions by their present-day adherents
• 25 U.S.C. § 3002 — Ownership of newly excavated items: Native American cultural items excavated or discovered on federal or tribal lands after November 16, 1990, belong first to lineal descendants; if lineal descendants cannot be ascertained, to the most closely affiliated tribe; if affiliation cannot be determined, to the tribe on whose land the items were found
• 25 U.S.C. § 3003 — Inventory requirement: federal agencies and museums must compile inventories of holdings of Native American human remains and associated funerary objects; must consult with tribal officials and traditional religious leaders; must identify geographic and cultural affiliation to the extent possible; must complete the process and notify tribes
• 25 U.S.C. § 3004 — Summary requirement: for unassociated funerary objects, sacred objects, and objects of cultural patrimony, agencies and museums must provide a written summary (not a full item-by-item inventory) describing the scope, kinds of objects, and extent of their collection; summaries must be provided to potentially affiliated tribes
• 25 U.S.C. § 3005 — Repatriation: upon request from a lineal descendant or culturally affiliated tribe, the agency or museum must expeditiously return covered items; repatriation may not occur before a specified consultation period; competing claims between tribes must be resolved through a consultation process; agencies may not transfer, trade, or otherwise dispose of covered items without consulting the appropriate tribes; scientific study may continue only with consent
• 25 U.S.C. § 3006 — NAGPRA Review Committee: the Secretary of Interior must establish a 7-member committee to monitor inventory and repatriation activities; three members nominated by tribal organizations, three by national museum associations, one jointly; the Committee hears disputes, issues findings, and makes recommendations
• 25 U.S.C. § 3007 — Penalties: museums failing to comply may be assessed civil penalties; each violation is a separate offense; penalties may be reduced or waived if the museum can demonstrate good faith
• 25 U.S.C. § 3013 — Enforcement: federal district courts have jurisdiction over NAGPRA violations; may issue orders necessary to enforce compliance

The Five Categories of Covered Items

NAGPRA distinguishes among five types of cultural items, and the applicable procedures differ slightly by category:

1. Human remains: The physical remains of a person of Native American ancestry. This is the most sensitively treated category — repatriation upon request is mandatory when cultural affiliation is established. Human remains may not be subjected to new scientific studies without tribal consent.

2. Associated funerary objects: Items that were made exclusively for burial purposes and were placed with the human remains. These are inventoried alongside remains and repatriated together.

3. Unassociated funerary objects: Items originally placed with human remains but now separated from them. These are addressed through the written summary process and must also be repatriated when affiliation is established.

4. Sacred objects: Items needed by traditional religious leaders for the practice of present-day Native American religions. The emphasis on "needed by present-day practitioners" is important — it's not just about historical religious use, but current religious practice.

5. Objects of cultural patrimony: Items with ongoing cultural importance central to the tribal group as a whole — items that belonged to the community rather than individuals and could not have been alienated by any single person. Examples might include communal shields, clan drums, or objects with group-wide ceremonial significance.

Cultural Affiliation: The Central Challenge

The most difficult aspect of NAGPRA implementation is determining cultural affiliation — whether a present-day tribe has a shared group identity traceable to the people associated with the items in question. The law requires using "geographical, kinship, biological, archaeological, anthropological, linguistic, folkloric, oral traditional, historical, or other relevant information or expert opinion."

For items excavated in the past century from clearly identified tribal territories, affiliation is often straightforward. For older items — 3,000-year-old skeletal remains, pre-contact ceremonial objects — affiliation can be genuinely contested between tribes, between scientific researchers and tribes, or simply unknown. When affiliation cannot be determined, items remain in collections as "culturally unidentifiable" — a major ongoing issue, as hundreds of thousands of human remains and objects remain in this limbo.

The 2010 NAGPRA regulations addressed culturally unidentifiable human remains by creating a pathway for repatriation even when specific affiliation is unclear: remains may be transferred to tribes that are connected to the territory where the remains were found, even without a direct lineal or cultural affiliation.

Who Must Comply

NAGPRA covers two categories of institutions:

Federal agencies: All agencies of the federal government that have collections of Native American items. This includes the Smithsonian Institution (which has its own separate repatriation framework under the National Museum of the American Indian Act), the National Park Service, Army Corps of Engineers, Bureau of Land Management, Forest Service, and many others.

Museums receiving federal funds: Any institution that receives federal funding (grants, contracts, etc.) and possesses covered items must comply. This includes most major natural history museums, university collections, state museums, and art museums with ethnographic collections. A private museum that receives no federal funding is not subject to NAGPRA — though tribal representatives often engage such institutions voluntarily.

How It Affects You

If you are a member of a tribe or Native Hawaiian organization with repatriation interests: Your tribe may have outstanding or unresolved repatriation claims against museums, federal agencies, or universities — many of which are still working through compliance backlogs. The National Park Service's NAGPRA database at nps.gov/subjects/nagpra is publicly searchable: you can look up the inventories that federal agencies and federally funded museums have submitted, the notices of intent to repatriate published in the Federal Register, and what items have already been transferred. Your tribal THPO (Tribal Historic Preservation Officer) or cultural department is typically the institutional entry point for claims — they can file formal repatriation requests under 43 CFR Part 10 and request an NPS grant to support your tribe's repatriation consultation and transportation costs (NAGPRA grants are available to tribes at nps.gov/subjects/nagpra/grants.htm). The 2023 regulatory update to NAGPRA — effective January 2023, 43 CFR Part 10 — significantly strengthened tribal rights regarding "culturally unidentifiable human remains," requiring institutions to affirmatively repatriate remains where geographic or cultural connection is plausible rather than placing the burden entirely on tribes to prove specific affiliation. If your tribe has been told in the past that remains can't be repatriated because affiliation is unclear, the 2023 rule change may reopen those conversations.

If you work at a museum, university, or federal agency with Native American collections: NAGPRA compliance is not optional and is not fully complete at most major institutions — a 2023 ProPublica investigation documented that decades after NAGPRA's passage, major universities and museums still hold hundreds of thousands of Native American human remains. Your institution must: maintain a complete written inventory of all collections that potentially include NAGPRA-covered items (25 U.S.C. § 3003), consult with lineal descendants and affiliated tribes (§ 3005), and complete repatriation upon request. The 2023 DOI regulatory updates (43 CFR § 10.11) require proactive steps for culturally unidentifiable remains — passive inventory maintenance is no longer sufficient compliance. Non-compliance can result in civil penalties up to $10,000 per violation per day under 25 U.S.C. § 3007, plus loss of federal funding eligibility. More practically, recent enforcement has included public NPS findings against non-compliant institutions and referrals to DOJ. Designate a compliance officer, ensure inventories are current, and document tribal consultation processes rigorously. The American Alliance of Museums (AAM) at aam-us.org and Association on American Indian Affairs (AAIA) at indian-affairs.org provide compliance resources and training.

If you are an archaeologist, physical anthropologist, or researcher working with Native American collections: NAGPRA doesn't prohibit scientific study of Native American items, but it fundamentally changes the consent framework. For items covered by NAGPRA — including human remains, funerary objects, sacred objects, and objects of cultural patrimony — you must obtain consent from the affiliated tribe or lineal descendants before conducting any study. "Study first, consult later" is not compliant. The 2023 regulatory updates made this more explicit: institutions must complete repatriation before engaging in scientific study when a repatriation request has been made. Plan research timelines accordingly — tribal consultation is not a checkbox but a genuine engagement that may take months. Collaborative research models, where tribal cultural liaisons are co-investigators with decision-making authority, have become both a best practice and increasingly a grant funding requirement. The Society for American Archaeology's NAGPRA and Repatriation resources at saa.org provide methodological guidance; the American Anthropological Association at americananthro.org has published ethical guidelines for working with NAGPRA-covered items.

If you follow indigenous rights, cultural property, or museum ethics debates: NAGPRA's implementation gap has been one of the most documented failures in federal cultural policy. As of 2023, NPS estimated that federally-covered institutions still held approximately 110,000 Native American human remains and over 900,000 funerary and associated objects — 33 years after the law's passage in 1990. The law's affiliation requirement, which requires tribes to demonstrate specific cultural connection, was designed as a safeguard against over-broad repatriation but in practice became a mechanism that institutions used to defer or deny claims. The 2023 rule change moved the burden: institutions must now affirmatively identify potential tribal connections rather than waiting for tribes to prove specific affiliation. The National Congress of American Indians (ncai.org) and the Native American Rights Fund (narf.org) provide tribal perspectives on current NAGPRA implementation; the Antiquities Coalition (theantiquitiescoalition.org) tracks broader cultural property repatriation policy internationally.

Implementing Regulations

• 43 CFR Part 10 — Native American Graves Protection and Repatriation Regulations: the Department of the Interior's implementing regulations for NAGPRA, significantly revised in January 2023 (88 FR 2, the most major update since the original 1995 rules). Part 10 operationalizes NAGPRA's requirements with specific procedures and timelines:

  • § 10.3 — Cultural affiliation determination: to establish cultural affiliation, institutions use "a reasonable connection" standard based on a preponderance of the evidence from geographical, kinship, biological, archaeological, linguistic, folkloric, oral tradition, historical, or other relevant information or expert opinion; the 2023 regulation reversed the burden — institutions must make an affirmative effort to determine cultural affiliation rather than treating items as unaffiliated by default; for human remains where direct cultural affiliation cannot be established, the 2023 rule allows repatriation based on geographic connection to tribal ancestral territory
  • § 10.4 — Discovery on federal/tribal lands: any person who discovers what may be Native American human remains or cultural items on federal or tribal lands must stop work and notify the responsible federal official within 24 hours; work in the immediate area must cease; a reasonable effort must be made to protect the items during the notification period; unauthorized excavation of Native American human remains is a federal crime under 18 U.S.C. § 1170; the 2023 rule strengthened the stop-work requirement and clarified what constitutes "immediate area"
  • § 10.5 — Planned excavations: when excavation of federal or tribal lands may disturb Native American human remains or cultural items, the agency must consult with potentially affiliated tribes prior to authorization; the permit or contract must include provisions for disposition of any discovered items; the agency must give tribes reasonable opportunity to participate in the excavation; excavated items from tribal lands must be returned to the tribe
  • § 10.8 — Museum inventory: each museum and federal agency must compile a written inventory of all holdings or collections that may include Native American human remains and associated funerary objects; inventories must include, to the extent possible, a description of each item's nature, circumstances of collection, and cultural affiliation; institutions must send inventory summaries to tribes with potential affiliation by the date specified in law (originally 1995; the 2023 rule created new deadlines for institutions not previously in compliance)
  • § 10.10 — Repatriation: upon receipt of a written request from a lineal descendant or affiliated tribe, the institution must begin consultation to develop a repatriation plan; repatriation must occur within 90 days of receiving the request when cultural affiliation is established; the 2023 rule eliminated the prior exception for "scientific study" as a basis for deferring repatriation — tribal consent is now required for any continued scientific study of affiliated remains
  • § 10.11 — Civil penalties: failure to comply may result in civil penalties assessed by the Assistant Secretary of the Interior; penalties up to $10,000 per violation per day under 25 U.S.C. § 3007; the NAGPRA Review Committee investigates complaints and recommends penalties; non-compliance may also result in loss of federal funding eligibility; the Trump administration significantly reduced enforcement activity, but the penalty authority remains

  The 2023 regulatory update was the most consequential change to NAGPRA implementation since the original rules. Interior cited evidence that 33 years after enactment, institutions collectively still held approximately 110,000 human remains and over 900,000 funerary and associated objects. The 2023 rule's most controversial changes: (1) eliminating the right of scientific access to remains without tribal consent; (2) requiring repatriation based on geographic connection (not just demonstrated cultural affiliation); and (3) placing affirmative obligations on institutions rather than passive duties. Multiple museum organizations and researchers challenged the 2023 rule in federal court; litigation was pending as of 2026. Recent rulemaking: 88 FR 2 (January 3, 2023) — comprehensive regulatory revision effective January 12, 2023.

State Variations

NAGPRA is a federal law. Several states have enacted their own repatriation laws covering state-funded institutions and items found on state lands. See also Historic Preservation and Antiquities and the National Register of Historic Places for the broader federal historic preservation framework that intersects with NAGPRA at archaeological sites — California, New Mexico, Oregon, Hawaii, and others have state NAGPRA equivalents that may extend to institutions not covered by federal law or items not covered by the federal act. State laws vary in scope, covered items, and enforcement mechanisms.

Pending Legislation

No major NAGPRA amendments are pending as of 2026. The Department of Interior's 2023 regulatory updates significantly changed how institutions must treat culturally unidentifiable human remains, requiring affirmative repatriation where geographic connection exists rather than merely allowing it. Implementation of these regulatory changes is ongoing.

Recent Developments

The Department of Interior issued major revisions to NAGPRA regulations in January 2023, the most significant update since the original 1995 regulations. Key changes: (1) institutions may no longer use human remains or objects for scientific study without tribal consent, eliminating the prior "right of access" for scientific research; (2) the burden of proof for establishing that items are NOT Native American shifts to the institution; (3) timelines for completing repatriation are shortened; (4) new requirements for geographic connection-based repatriation of unidentifiable remains. These changes generated significant controversy among natural history museums and the scientific research community, with several institutions and researchers challenging the new rules as inconsistent with the statute's text.

• 2023 regulation challenges and litigation (2024-2025): Multiple museum associations, universities, and individual scientists challenged the 2023 NAGPRA regulations in federal court, arguing that Interior exceeded its statutory authority by eliminating the "right of access" for scientific study. The core dispute is whether NAGPRA's text authorizes complete tribal control over study of unaffiliated remains (as the 2023 rule provides) or only regulates repatriation of affiliated remains. Courts have issued mixed preliminary rulings; the litigation is likely to reach the D.C. Circuit and potentially the Supreme Court given the conflict between tribal sovereignty interests and scientific research access.
• Trump DOI and NAGPRA (2025): The Trump administration's Interior Department has been less aggressive than the Biden DOI in NAGPRA enforcement — consistent with its broader approach of reducing federal oversight of state and private institutions. Interior reduced staffing of the NAGPRA Review Committee and slowed processing of tribal repatriation requests. Some tribal nations expressed concern that deferred enforcement would allow institutions to continue to delay compliance with the 2023 regulations. However, Interior did not move to reverse the 2023 rule, which was a Biden priority that tribal nations strongly supported.
• Repatriation backlog at major museums: The 2023 regulation changes accelerated repatriation requests to major natural history museums — the Smithsonian, the American Museum of Natural History, the Field Museum, Harvard's Peabody Museum, and university collections nationwide. These institutions collectively hold hundreds of thousands of Native American human remains and cultural items. Processing repatriation requests requires tribal consultation, cultural affiliation determinations, and physical inventory work — a multi-year undertaking even with full institutional commitment. The Smithsonian (governed separately from other NAGPRA institutions under the National Museum of the American Indian Act) has committed to a 10-year repatriation acceleration plan.
• Kennewick Man and ancient remains classification: The 2023 regulations' expansion of repatriation to geographically connected (not just culturally affiliated) remains directly addressed the Kennewick Man controversy — where a 9,000-year-old skeleton found in Washington State was the subject of a decade-long legal battle between scientists seeking study access and tribal nations claiming cultural connection. Under the 2023 rule, ancient remains found in a tribal nation's ancestral territory are presumptively subject to repatriation even without direct cultural affiliation evidence. The remains have been repatriated to the Confederated Tribes of the Colville Reservation.