# Antiquities Act **Type:** Federal law — Act of June 8, 1906, ch. 3060, 34 Stat. 225 **Codified:** 54 U.S.C. §§ 320301–320303 (recodified from 16 U.S.C. §§ 431–433 in 2014); criminal provision at 18 U.S.C. § 1866(b) **Signed:** June 8, 1906 by [[Theodore Roosevelt]] **Floor manager:** Rep. John F. Lacey (R-Iowa), Chairman, House Committee on Public Lands **Status:** In effect, and in the middle of the most serious legal crisis of its existence ## Summary Three paragraphs of statutory text, passed without recorded controversy to stop the looting of Southwestern archaeological sites, that turned out to be the broadest unilateral land-management power any Congress has ever handed a president. The Antiquities Act lets the president, acting alone and without notice, comment, environmental review, or congressional approval, declare **national monuments** on federal land by proclamation. Eighteen of the twenty-one presidents since 1906 have used it — nine Democrats and nine Republicans — to create more than 160 monuments protecting hundreds of millions of acres, including the land that became Grand Canyon, Zion, Olympic, Acadia, Death Valley, and Joshua Tree national parks. The operative grant is one sentence, and so is the limit on it: > **(a)** "The President may, in the President's discretion, declare by public proclamation historic landmarks, historic and prehistoric structures, and other objects of historic or scientific interest that are situated on land owned or controlled by the Federal Government to be national monuments." > > **(b)** "The President may reserve parcels of land as a part of the national monuments. **The limits of the parcels shall be confined to the smallest area compatible with the proper care and management of the objects to be protected.**" Every fight over the Act for 120 years is a fight over the second sentence. ## Origins By the 1890s commercial "pothunting" was stripping Mesa Verde, Chaco Canyon, and Casa Grande of artifacts for sale, destroying archaeological context wholesale. Congress had no general preservation authority — only ad hoc measures like the 1889 Casa Grande appropriation and the withdrawal power in the Forest Reserve Act of 1891. Bills to fix this failed from 1900 onward, deadlocked between a version vesting the power in the president and a competing version vesting it in the Secretary of the Interior with a **320-acre cap per site**. The Archaeological Institute of America broke the impasse by having archaeologist **Edgar Lee Hewett** draft a compromise — and Hewett's decisive choice was to put the authority in the **president's** hands, unbounded by acreage. The acreage question did come up. During House debate, Lacey assured his colleagues that the "smallest area compatible" language would prevent extensive withdrawals, expressly contrasting the bill with the Forest Reserve Act's tens of millions of acres. That floor assurance is the most-quoted piece of legislative history in every modern monument case — cited by Utah, by the Justice Department, and by the Tenth Circuit in 2026. Roosevelt proclaimed Devils Tower the first national monument in September 1906 and the Grand Canyon — more than 800,000 acres of it — in January 1908, roughly eighteen months after signing a law whose sponsor had promised it would not be used for large withdrawals. ## The two carve-outs Congress actually enacted In 120 years Congress has never amended the core grant. It has twice limited it geographically, both times in direct reaction to a specific proclamation: **Wyoming (1950).** [[Franklin D. Roosevelt]] proclaimed Jackson Hole National Monument in March 1943 over ferocious local opposition, pocket-vetoed a bill abolishing it, and watched Congress refuse to appropriate a dollar for it for seven years. The 1950 settlement folded Jackson Hole into Grand Teton National Park and added what is now § 320301(d): *"No extension or establishment of national monuments in Wyoming may be undertaken except by express authorization of Congress."* An outright prohibition. **Alaska (1980).** [[Jimmy Carter]] proclaimed **17 Alaska monuments totaling roughly 56 million acres in a single day**, December 1, 1978 — the largest use of the Act ever, executed while Congress was deadlocked over Alaska lands legislation. Congress responded with ANILCA, which superseded the proclamations by folding the lands into a statutory scheme, and added a prospective limit: any future executive withdrawal exceeding **5,000 acres in the aggregate** in Alaska requires notice to Congress and **terminates within one year unless Congress passes a joint resolution approving it.** Every other attempt to limit the Act has failed. That includes the current one: **S. 220 / H.R. 521, the Ending Presidential Overreach on Public Lands Act** (Sens. John Curtis and [[Mike Lee]]; Reps. Celeste Maloy and Mark Amodei, introduced January 27, 2025), which would not limit the delegation but **strike Section 2 of the Act entirely**, ending unilateral presidential designation and giving Congress sole authority to create, modify, or revoke monuments. It has not been enacted. ## The reduction question — 87 years of settled answer, then 2025 The Act says nothing about undoing a monument. The executive branch's answer was settled in **1938**, when Attorney General Homer Cummings was asked whether the president could abolish Castle Pinckney National Monument and concluded he could not: *"the grant of power to execute a trust … by no means implies the further power to undo it when it has been completed."* No president has ever abolished a monument. Presidents did **reduce** monuments — eighteen times before 2017, most notably Kennedy trimming Bandelier by roughly 4,000 acres — on the theory that the "smallest area compatible" clause implies a power to correct an over-inclusive boundary. That was the state of the law when [[Donald Trump]] issued **Executive Order 13792** in April 2017, directing [[Ryan Zinke]] to review every designation since 1996 over 100,000 acres. Twenty-seven monuments were reviewed; 2.4 million public comments were filed. In December 2017 Trump cut [[Bears Ears National Monument]] by about 85 percent and [[Grand Staircase-Escalante National Monument]] by about 47 percent. Tribes and conservation groups sued immediately — *Hopi Tribe v. Trump* and companions — and notably, **the Justice Department's own litigating position conceded that a president cannot revoke a monument**, arguing only for a power to shrink. The merits were never decided; [[Joe Biden]] restored both monuments in October 2021 and the cases went quiet. **On May 27, 2025 the [[Office of Legal Counsel]] threw the 1938 opinion out.** In *Revocation of Prior Monument Designations*, addressed to the Counsel to the President, OLC concluded that a president may alter a prior declaration **including by eliminating the land reservation entirely**, by determining that the identified landmarks, structures, or objects *"never were or no longer are deserving of the Act's protections."* The analytic move is precise and consequential: OLC treats the **protected object, not the land parcel, as "the monument."** Because subsection (b) ties the reservation to the objects, redefining the objects redefines — or erases — the reservation. Castle Pinckney, it held, "was incorrect, and that opinion can no longer be relied upon." That opinion is the legal engine of everything that followed. ## The judicial question — from Roberts's warning to the Tenth Circuit For two decades, challenges to designations lost on procedure rather than merits. The D.C. Circuit decided *Mountain States Legal Foundation v. Bush* and *Tulare County v. Bush* on the same day in October 2002, dismissing both because plaintiffs pleaded legal conclusions instead of facts — while holding along the way that ecosystems and scenic vistas can qualify as protectable "objects," that proclamations need not describe the objects in detail, and that presidential action is not reviewable under the [[Administrative Procedure Act]]. Earlier, *Cameron v. United States* (1920) had upheld the Grand Canyon monument and established that **natural features, not only antiquities, are protectable**; *State of Alaska v. Carter* (1978) held the president is not a "federal agency" and so the [[National Environmental Policy Act]] does not apply to proclamations. **In March 2021 [[John Roberts]] wrote the statement that changed the trajectory.** Concurring in the denial of certiorari in *Massachusetts Lobstermen's Association v. Raimondo* — a challenge to Obama's 5,000-square-mile Atlantic marine monument — the Chief Justice wrote that the "smallest area compatible" restriction *"has ceased to pose any meaningful restraint,"* and that a statute authorizing the designation of "landmarks," "structures," and "objects" had been *"transformed into a power without any discernible limit."* He agreed with denial only because no court of appeals had squarely addressed the question and the record was inadequate. It read as an invitation. **It was accepted on June 23, 2026.** In *Garfield County v. Trump* — Utah's challenge to Biden's *restorations* — the Tenth Circuit reversed the district court 2–1 and held that **sovereign immunity does not bar ultra vires review of Antiquities Act proclamations**. The majority (Judge Carson) distinguished presidential *discretion*, which is unreviewable, from presidential *authority*, which is not: subsection (b)'s "shall be confined" is **mandatory language imposing a judicially enforceable constraint**. "When the President exceeds statutory limits placed on his power, his actions are ultra vires and enjoy no immunity from suit." Judge Federico dissented, arguing the statute's undefined terms vest interpretive discretion in the president. The case was remanded for the district court to interpret the statutory scope of "objects of historic or scientific interest." This is the first federal appellate holding that the "smallest area compatible" clause has teeth. It answers Roberts's question, and it creates a live split with the D.C. Circuit's *Tulare County* line. ## Where it stands, August 2026 Three weeks after the Tenth Circuit ruling — and one month after Utah's [[Congressional Review Act]] effort against the Grand Staircase management plan died in the Senate — Trump signed **Proclamations 11043 and 11044 on July 13, 2026**, cutting Bears Ears to roughly 121,096 acres and Grand Staircase-Escalante to roughly 181,541 acres. Cuts of about **91 and 90 percent**, roughly **2.93 million acres removed** — by an order of magnitude the largest monument reduction in the Act's history. The stated rationale is a direct application of the 2025 OLC theory: that the prior designations violated "smallest area compatible," that generic features (sedimentary rock layers, petroglyphs "common throughout the American West," landscape-scale biodiversity) are not qualifying objects, that other statutes already protect the resources, and that [[Bureau of Land Management]] lacks the capacity to manage the acreage. The Bears Ears proclamation additionally invokes **critical minerals — silver, copper, uranium, vanadium — as a national-security justification**, a first. Mineral entry on the excluded lands opens **September 11, 2026**. Mining claims have already been filed in San Juan and Kane Counties; [[Earthjustice]] has asked BLM to reject them as premature. Tribal nations and conservation groups have announced litigation; **as of August 14, 2026 no complaint has been confirmed filed.** Note the irony in the posture. Utah spent four years litigating for the proposition that monument proclamations are reviewable, in order to attack Biden's restorations. It won that proposition in June 2026. The doctrine now belongs to whoever sues over Proclamations 11043 and 11044. ## KB significance **1. The purest available test of unilateral executive power.** The Act delegates a vast power in three paragraphs with one vague limit and no procedure. It is therefore the cleanest laboratory in federal law for the questions this KB tracks under [[Unitary Executive Theory]]: what does a president get to decide alone, who may say otherwise, and does an eighty-seven-year-old executive-branch legal opinion bind the executive branch that wrote it? The 2025 OLC opinion's answer to that last question — no — is a template far broader than public lands. **2. The Sagebrush pipeline, completed.** The Act is the specific statute the [[Sagebrush Rebellion]] has been organized against since 1979. Its opponents' decisive victories came not through referendum or litigation but through **personnel and drafting**: [[James Watt]] to Interior under Reagan, [[William Perry Pendley]] to [[Bureau of Land Management]] and then to the [[Project 2025]] Interior chapter, and an OLC staffed to produce the opinion the movement had wanted since 2017. See [[American Stewards of Liberty]] for the grassroots arm and [[30x30 Conservation Initiative]] for the conservation program the same coalition killed. **3. Ratchet asymmetry.** Designation takes a signature; so, now, does erasure. What the Act cannot produce is durability. Bears Ears has had four boundaries in ten years. That is the general shape of policy made entirely by executive instrument, and it is why both the conservation coalition and the property-rights coalition have concluded — for opposite reasons — that Congress should decide. **4. A third mechanism nobody has ruled on.** The Utah proclamations shrink boundaries. The Pacific fishing proclamations do something different — they leave boundaries intact and amend the *management regime*, finding that existing fisheries statutes make monument prohibitions unnecessary. That is neither revocation nor diminishment, the 2025 OLC opinion does not squarely authorize it, and the one court to look at it so far ruled only on the agency's procedure. See [[Pacific Islands Heritage Marine National Monument]]. **5. Tribal sovereignty as a live constitutional question.** Bears Ears is the first monument proposed by a coalition of sovereign nations with a formal co-management role. Whether that role survives a boundary cut of 91 percent is a federal-Indian-law question the reduction litigation will have to reach. --- ## See Also - [[Antiquities Act Timeline]] — the full chronology, 1889 to the present - [[Bears Ears National Monument]] — the contested center of the modern fight - [[Grand Staircase-Escalante National Monument]] — the 1996 designation that revived the controversy - [[30x30 Conservation Initiative]] — the parallel conservation program, killed by the same coalition - [[Sagebrush Rebellion]] — the movement organized against the Act - [[Bureau of Land Management]] — manager of most contested monument acreage - [[Office of Legal Counsel]] — author of the 2025 opinion reversing 87 years of doctrine - [[Papahānaumokuākea Marine National Monument]] — the largest designation ever made, and the marine test case - [[Pacific Islands Heritage Marine National Monument]] — where the reduce-protections-without-moving-boundaries theory is being litigated - [[Stonewall National Monument]] — an Antiquities Act designation outside the western-lands frame ## See also - [[Federal Land Management Crosswalk]] — the monument proclamation as one of five land levers: no notice, no comment, no congressional role, judicial review unsettled after 120 years, and it moves no acre between agencies - [[Federal Land Policy and Management Act]] - [[Bears Ears National Monument]] - [[Grand Staircase-Escalante National Monument]]