The door is open: How Guam can become a manufacturing hub for the Indo-Pacific

The Long Way By Samuel S. Kim

Part 2 of a four-part series on the 2026 Guam elections.

Most residents of Guam have never heard of General Headnote 3(a)(iv). That is understandable. It is a single line buried deep in the U.S. Harmonized Tariff Schedule, a federal trade document most people have no reason to read.

But that provision may represent the most significant and most time-sensitive economic opportunity Guam has seen in a generation. And in 2026, voters will choose whether to send leaders to office who understand it—or whether to let the moment pass.

Here is what it says, in plain terms: products manufactured in Guam, with enough local value added, can enter the United States duty-free. Not at a reduced rate. Zero.

At a moment when U.S. tariffs on goods from South Korea, Japan and much of Asia have reached levels not seen in decades, that single provision changes the math for manufacturers across the region.

 When sweeping U.S. tariffs took effect in 2025, factories in Seoul and Tokyo faced a stark problem: goods they had been shipping profitably to American customers suddenly carried new costs that threatened their margins.

The natural response was to look for alternative ways to continue reaching the U.S. market without absorbing tariffs that could make their products uncompetitive.

Guam is one answer they may not have considered yet.

Because Guam sits outside the U.S. customs zone, foreign materials and components can be imported to the island without U.S. tariffs. If a manufacturer then adds at least 30 percent of the product’s value in Guam through assembly or processing, the finished goods can be shipped into the U.S. mainland duty-free under Headnote 3(a)(iv).

Gary Hiles, chief economist at the Guam Department of Labor, confirmed it plainly: U.S. tariffs apply to Puerto Rico but not to Guam. Products made in Guam are treated as U.S.-made under federal tariff rules.

The result is a legal, straightforward pathway for Korean and Japanese manufacturers to continue accessing the American market — by setting up operations on an island that is three hours from Tokyo and four hours from Seoul, protected under U.S. law, and staffed by people who are already U.S. nationals.

 South Korea and Japan produce electronics, medical devices, pharmaceuticals, specialty foods and consumer goods—many now facing significant U.S. tariff exposure. They are also the two countries with the deepest existing ties to Guam.

Japan has historically been the island’s largest source of tourists and foreign investment. South Korea is a growing presence in both.

The cultural familiarity, business relationships and geographic proximity are assets that cannot be built from scratch—Guam already has them.

An added dimension: products manufactured in Guam already receive preferential tariff treatment in Japan and Australia under existing trade arrangements. A company producing goods here does not just gain duty-free access to the U.S. —it potentially gains favorable access to other Pacific markets as well.

Rational companies in Seoul and Tokyo are beginning to calculate this. The question is whether Guam will be ready when they arrive.

Sen. William Parkinson introduced Bill 102-38, the Guam Tariff Advantage Development Act, in 2025, and the legislature heard it in committee in October of that year.

The bill would create designated Tariff Advantage Zones with dedicated infrastructure, a qualifying certificate category offering up to 75 percent corporate income tax rebates for up to 20 years, a 100 percent real property tax abatement for the first 10 years, and a requirement that at least 60 percent of the workforce be Guam residents.

That last point matters. The goal is not to build an enclave that profits foreign capital while Guam residents watch from outside. The goal is local jobs, local wages, and a local tax base that grows because people have real reasons to stay.

Sen. Tony Ada introduced a complementary measure, Bill 174-38, the Free Trade Logistics Zone Act of 2025, to designate a logistics zone and position Guam as a re-export center for the wider Indo-Pacific. Both bills represent the same core insight from different angles.

Neither has passed yet. Both are waiting for a legislature that will act on them— and a governor who will champion them.

 This opportunity does not manage itself. It requires coordinated action from all three levels of government on the 2026 ballot.

The legislature must pass and fund the bills. The budget office warned in May 2025 that Bill 102-38’s mandates could arrive unfunded, and GEDA acknowledged its industrial parks are near capacity.

These are real constraints that demand real legislative solutions — not reasons to delay. Every senate candidate in 2026 should answer directly: Do you support Bill 102-38? Where does the money come from?

The governor must lead outreach before the bills even pass. Legislation takes time. Business decisions do not wait. A governor who understands this opportunity can direct GEDA to build a Korea-and-Japan investor pipeline on day one — sector-targeted, backed by real data on Guam’s tariff status and incentive landscape.

A governor can personally lead trade missions to Seoul and Tokyo. None of this requires a legislative vote. It requires a governor who has done the homework.

The Congressional Delegate must close the tax gap. Foreign companies investing in Guam pay a 30 percent federal withholding tax on income remitted home — a rate the 50 states avoid through U.S. tax treaties but which Guam cannot change without Congress.⁸ For a Korean or Japanese company comparing Guam to Vietnam or Malaysia, that discrepancy matters. Closing it is the delegate’s fight — and voters should demand a specific plan from every delegate candidate.

 This opportunity is real. So are the obstacles.

Reliable power and water must come first. No manufacturer will sign a long-term lease on a facility where outages are a routine planning variable. The infrastructure investment described in Part One is a prerequisite, not a parallel track.

Industrial land is in short supply. GEDA’s acknowledgment that its parks are near capacity means Tariff Advantage Zones need land identified and prepared before the first investor arrives.⁷ That is a multi-year project that must start now.

The 30 percent value-added requirement will be enforced. Manufacturers who set up nominal operations in Guam to claim duty-free status without genuinely adding value here will not last. A rigorous compliance framework is essential from day one.

 For governor: Have you studied Headnote 3(a)(iv)? Will you personally lead a trade mission to South Korea and Japan in your first year? Who leads GEDA, and what is their mandate?

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For senate candidates: Do you support Bills 102-38 and 174-38? How will you fund them? How do you ensure the workforce requirements benefit Guam residents?

For the congressional delegate: What is your strategy to close the withholding tax gap? Which committee relationships will you build to make that happen?

 The provision at the center of this argument has been sitting quietly in federal law for years. What changed is the global trade environment around it. Korean and Japanese manufacturers facing new tariff barriers are actively looking for lawful alternatives. Guam, with its unique legal status, geographic position, and existing relationships in both countries, could be the answer many of them find — if the island’s next leaders act with urgency and intelligence.

The door is open. What Guam needs in 2026 is a governor, a legislature and a delegate who understand what that means and are prepared to walk through it together.

 Samuel S. Kim is a tech executive and engineering leader with more than 20 years of experience. He founded and scaled a 60-person R&D division in Seoul and holds a degree in Economics from UCLA. He writes as a concerned resident and registered voter of Guam. He can be contacted at sk102.co.

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