Section 484 of the Tariff Act of 1930 at 19 U.S.C. § 1484 Provides That the Importer of Record Shall Make Entry of All Merchandise Arriving Within the United States, Approximately 5,200 Metric Tons of Extraterrestrial Merchandise Arrive Every Year Without a Single Entry Having Ever Been Filed, the $800 De Minimis Exemption Was Suspended for All Countries on August 29, 2025, Meaning That Every Import Regardless of Value Now Requires Formal Entry and Payment of Applicable Duties, Entry Requires a Country of Origin and the Harmonized Tariff Schedule Contains No Country-of-Origin Code for the Asteroid Belt, the Iowa Supreme Court Held in Goddard v. Winchell, 86 Iowa 71 (1892), That a Fallen Aerolite Becomes Part of the Soil Upon Landing, the Federal Government Has Itself Transported More Than 23,000 Undeclared Specimens to the Johnson Space Center Since 1976, and Every Museum Case, Auction Lot, and Private Collection in America Holds Merchandise Introduced Contrary to Law Subject to Seizure and Forfeiture Under 19 U.S.C. § 1595a

I. The Entry Requirement

Section 484 of the Tariff Act of 1930, codified at 19 U.S.C. § 1484, provides that the importer of record shall make entry of imported merchandise by filing with the Customs Service such documentation, or electronic data, as is necessary to enable the agency to determine whether the merchandise may be released from customs custody, to properly assess duties on the merchandise, to collect accurate statistics with respect to the merchandise, and to determine whether any other applicable requirement of law is met.¹ The statute is not aspirational. It is the procedural spine of the American customs system: nothing arrives without an entry, and every entry states what the merchandise is, what it is worth, where it came from, and what duty is owed.

The obligation attaches to merchandise. The statute does not define merchandise to exclude objects that arrive without a shipper, without an invoice, without a bill of lading, and without any prior contact with the human species. The entry requirement is not conditioned on the existence of a willing declarant. It is conditioned on arrival.

Arrival, in the case under review, is well documented. It occurs continuously, in all fifty states, at all hours, and has done so for the entire period for which records exist.

II. The Closed De Minimis Door

The anticipated objection is that the amounts involved are trivial, and that small imports were, until recently, excused from the formalities of entry. The objection was valid once. It is valid no longer.

The $800 de minimis exemption, which permitted low-value shipments to enter the United States without formal customs entry, was suspended for all countries effective August 29, 2025, and the suspension was confirmed as continuing by executive order in February 2026.² The practical consequence is stated plainly in the trade press: all imports into the United States, regardless of value, now require formal customs entry and payment of applicable duties.³ There is no indication that the exemption will be reinstated.

This matters because much of the merchandise in question arrives in small quantities. A single micrometeorite weighs less than 350 micrograms. Under the former regime, one might have argued that a 350-microgram import fell within the de minimis threshold. That argument is now foreclosed. The door closed on August 29, 2025. The imports continued. They arrive at a rate of approximately 14 tons per day.

III. The Annual Volume of Undeclared Entries

After nearly twenty years of collection at the Concordia station at Dome C in Antarctica, an international team led by CNRS researcher Jean Duprat published its measurement of the extraterrestrial flux in Earth and Planetary Science Letters in 2021: approximately 5,200 metric tons of micrometeorites reach the Earth’s surface every year, about 1,600 tons of unmelted particles and 3,600 tons of cosmic spherules.⁴ Roughly four-fifths of the material originates in comets; the remainder comes from asteroids.⁵ The larger material, the kind the public thinks of as meteorites, adds approximately 10 more tons per year.⁶

The total annual import is therefore on the order of 5,210 metric tons, or 5.2 billion grams. The statute requires the agency to collect accurate statistics with respect to the merchandise. The statistics, collected by the French, are these.

The valuation is a matter of public record. Meteorites are, as Sotheby’s vice-chairman of science and natural history has observed, priced per weight, and collectors maintain spreadsheets tracking the per-gram market for Martian, lunar, and asteroidal material.⁷ A Martian chassignite sold at Christie’s in February 2022 for $20,000 per gram.⁸ Fragments of the Los Angeles Martian meteorite sold at Butterfields in 2000 for approximately $3,000 per gram.⁹ A 5,443-gram lunar meteorite sold at RR Auction in 2018 for $612,500, or approximately $112 per gram.¹⁰ The largest Martian meteorite ever found on Earth, a 54-pound stone designated NWA 16788, sold at Sotheby’s in July 2025 for $5.3 million.¹¹

At a conservative assumed valuation of one dollar per gram, far below every documented auction price for named falls, the annual undeclared import is worth $5.2 billion. The dutiable value has never been appraised by the agency, because the agency has never been told the merchandise exists.

IV. The Country-of-Origin Problem

Entry requires information. The informal-entry regulation at 19 CFR § 143.24 specifies the particulars that must be filed: country of origin of the merchandise, shipper name and address, ultimate consignee, specific description, and quantity.¹² The first item on the list is the one that cannot be completed.

Country of origin, under 19 CFR § 134.1(b), is the country of manufacture, production, or growth of an article. A meteorite was not manufactured. It was not grown. If it was produced anywhere, it was produced on a parent body that may no longer exist, in a region of space for which no country code has been assigned, by no manufacturer, under no flag. The entry form requires the declarant to state where the merchandise came from. The honest answer, “the asteroid belt,” is not an acceptable response in the Automated Commercial Environment. There is no HTS line for it. There is no ISO code for it. There is no trade agreement with it.

This is not a defense. It is the precise reason the regime exists. The entry statute was written to capture merchandise whose origin is unknown, whose value is undeclared, and whose shipper cannot be reached for comment. The merchandise in question satisfies all three conditions perfectly. It is the platonic ideal of an undeclared import.

V. The Iowa Precedent

The only American court to have squarely addressed the legal status of a fallen meteorite is the Supreme Court of Iowa. In Goddard v. Winchell, 86 Iowa 71, 52 N.W. 1124 (1892), an aerolite weighing sixty-six pounds fell onto a Winnebago County farm on May 2, 1890, burying itself three feet into the ground.¹³ The following day a neighbor dug it up and sold it to the defendant for $105. The landowner sued in replevin. The court held that the aerolite, having buried itself in the earth, had become part of the soil, and was therefore the property of the owner of the soil.¹⁴

The holding is frequently cited for the proposition that a meteorite becomes domestic property upon landing. The court did not hold that it becomes domestic merchandise. The distinction matters. The regulation governing informal entry of “products of the United States being returned” presupposes goods that were once here and left.¹⁵ The aerolite was never here. It did not leave. It arrived, and in arriving it became, in the court’s phrase, part of the realty. A thing can accede to Iowa soil without ever having cleared customs. The court determined title. It did not determine entry. No entry was filed in 1890. No entry has been filed since.

VI. The Government’s Own Import Operation

The largest single importer in the history of the trade is the United States government.

Since 1976, the Antarctic Search for Meteorites program, funded by the National Science Foundation and NASA, has deployed field parties to the Transantarctic Mountains to recover meteorite specimens from blue-ice stranding surfaces. The program has recovered more than 23,000 specimens.¹⁶ The specimens are placed in Teflon bags, kept frozen, and transported to the Antarctic Meteorite Curation Facility at the Johnson Space Center in Houston, Texas.¹⁷ Among them are the first meteorites recognized as coming from the Moon and from Mars, including the well-known Martian meteorite ALH 84001, which renewed scientific interest in Mars exploration in the 1990s.¹⁸

The program’s own public materials describe the specimens as “planetary materials, delivered to us from the Moon and Mars, free of charge.”¹⁹ Free of charge is not the same as free of duty. Antarctica is not part of the United States. The specimens were collected outside the country and transported to Houston. The Smithsonian Institution curates them. No entry documentation has ever been filed for any of them, by the government or by anyone else. The nation’s largest collection of undeclared imported merchandise is curated by the federal government, in a federal facility, under a cooperative agreement that was renewed for an additional decade.²⁰

The private sector’s compliance record is no better. Meteorites are openly bought and sold at auction houses and by dealers, in transactions the trade press describes in dollars per gram. The standard civilian guidance in the United States is that a meteorite found on one’s own land belongs to the landowner, that collection on Bureau of Land Management land is subject to stipulations, and that specimens found in national parks belong to the Smithsonian.²¹ None of the guidance mentions entry. None of it mentions duty. The entire domestic trade in extraterrestrial material operates on the assumption that arrival from space is not arrival at all.

VII. The Penalty Arithmetic

The enforcement statute is not subtle. Section 592 of the Tariff Act, codified at 19 U.S.C. § 1592, provides civil penalties for the entry of merchandise by fraud, gross negligence, or negligence, with the penalties in cases of fraud calibrated to the domestic value of the merchandise.²² Section 596, codified at 19 U.S.C. § 1595a, provides for the seizure and forfeiture of merchandise introduced or attempted to be introduced into the United States contrary to law.²³

Consider the arithmetic at the conservative valuation. If the annual undeclared import is worth $5.2 billion, the theoretical penalty exposure for a single year’s entries, assessed at the domestic value of the merchandise, is $5.2 billion. The trade has been operating since before the Tariff Act of 1930 was enacted. The statute of limitations does not appear in the night sky.

The objection that there is no importer of record to penalize proves too much. The entry statute obligates the importer. If no importer has come forward, the merchandise remains unentered, and unentered merchandise introduced contrary to law is subject to seizure wherever it is found. The penalty follows the goods.

VIII. The Seizure Inventory

The inventory of merchandise subject to seizure is extensive and well documented, because the trade’s participants keep excellent records.

On February 15, 2013, a 20-meter object weighing approximately 12,000 tons entered the atmosphere over Chelyabinsk Oblast at 19 kilometers per second, exploding at an altitude of roughly 30 kilometers with an energy later estimated at hundreds of kilotons.²⁴ The shock wave damaged approximately 7,200 buildings and injured 1,491 people.²⁵ Several thousand kilograms of the object reached the ground as meteorites; the largest fragment, weighing 654 kilograms, was raised from the bed of Lake Chebarkul on October 16, 2013.²⁶ It was the largest airburst since the Tunguska event of 1908.²⁷ That importation occurred in Russia. The American record is quieter but continuous: every observed fall on American soil, every Antarctic specimen in Houston, every auction lot, every museum drawer, every dealer’s inventory, every private collection.

The merchandise is not concealed. It is displayed. It is catalogued. It is insured. It is lent between institutions with loan forms and condition reports. The only form that has never been completed is the one the statute requires.

IX. Conclusion

The evidence does not require interpretation. It requires a Form 7501.

Section 484 of the Tariff Act of 1930 requires the importer of record to make entry of all imported merchandise. Approximately 5,210 metric tons of merchandise arrive from outside the United States every year. The $800 de minimis exemption that once excused small imports was suspended for all countries on August 29, 2025. The exemption is gone. The imports are not.

The country-of-origin field cannot be completed, because the country of origin does not exist in the agency’s tables. The Iowa Supreme Court held that a fallen aerolite becomes part of the soil, which determines who owns it and says nothing about whether it was entered. The federal government’s own program has transported more than 23,000 specimens to Houston without filing a single entry. The statute provides for seizure and forfeiture of merchandise introduced contrary to law, and for civil penalties calibrated to the domestic value of the merchandise.

At this moment, approximately 14 tons of undeclared merchandise are falling on the customs territory of the United States. They will land in fields, on roofs, in deserts, and in oceans. No broker has been retained. No entry will be filed. No duty will be paid. The largest undeclared import stream in American history arrives without a port, without a manifest, and without a Form 6059-B.

The agency maintains a website explaining how to make entry. It provides forms. It provides instructions. It provides a toll-free number. It does not provide a country-of-origin code for the asteroid belt.

Ergo.