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The five destination answers

The federal definition covers the states, District of Columbia and Puerto Rico. Read the table only within that definition: “inside” does not mean tax-free, and “outside” does not supply a tariff or entry permission.

DestinationUnder the cited definition
Puerto RicoInside the U.S. customs territory
GuamOutside
Northern Mariana Islands (CNMI)Outside
American SamoaOutside
U.S. Virgin IslandsOutside

Sources: U.S. Customs and Border Protection: Definition: Customs territory of the United States

Before approving the equipment order

Fictional example: a Dutch brand copies its Puerto Rico equipment-cost sheet for Guam and changes only the address. The customs assumption no longer matches, and neither destination’s boundary status supplies the missing product treatment or charges.

Establish the product, manufacturer/origin, intended use, classification, exporting party, importer, receiver, port and any onward journey. Local taxes, product controls, quarantine and federal overlays depend on the actual route and goods. A later territory-to-mainland shipment has its own treatment.

Keep legal duties/taxes distinct from freight, broker and storage quotes. A contingency funds uncertainty; it does not establish an unknown legal charge. A freight price alone is not a complete landed-cost calculation.

Scope

  • No tariff, tax amount, product-entry permission or onward-shipment treatment is determined here.

Next step

Obtain the product- and route-specific entry and charge answers before treating a shipping quote as landed cost.

Sources & review notes

The source records distinguish access dates from substantive review dates. Updating an explanation does not itself recheck the law.

19 CFR § 101.1: customs territory definition

U.S. Customs and Border Protection

Passage, dates and research notes

primary · Definition: Customs territory of the United States

includes only the States, the District of Columbia, and Puerto Rico.

Accessed: 2026-11-12T21:19:51Z · Meaning reviewed: 2026-11-12T21:28:57Z · Next review target: 2026-12-12

Current eCFR definition read. This geographical definition does not itself set a product duty, origin rule, quarantine condition, territorial levy or import process.

Detailed rule records (1)
Customs territory differs from political territory Source checked

19 CFR § 101.1 includes only the states, District of Columbia and Puerto Rico within the U.S. customs territory. Do not apply a mainland import route or rate to another territory solely because it is U.S. territory.

When to check: Choosing supply routes and landed-cost assumptions. Source review: 2026-11-12T21:28:57Z.

19 CFR § 101.1: customs territory definition
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