Mexico says it removed about 1,100 steel mills from its approved registry after discovering they didn't actually exist. International trade has reached an advanced compliance milestone: checking whether the factory is a factory.

Deputy economy minister Luis Rosendo Gutierrez described the purge Wednesday as part of tougher tracing of steel and other products. Mexico wants relief from U.S. steel, aluminum and auto tariffs and is trying to show Washington that its trade preferences aren't a route for dodging those barriers.

An approved list is supposed to reduce uncertainty. It becomes less reassuring when a large part of the inspection involves waving your hand through the approved building.

Before discussing rules of origin, perhaps establish rules of existence.

The registry claim comes from Gutierrez, not an independent mill-by-mill investigation in this report. He says many removed entries were in Asia and that tighter measures helped reduce imports. The announcement doesn't establish how each nonexistent facility got approved or prove that every disputed shipment was a tariff dodge.

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That distinction matters. Analysts dispute the idea that Mexico is simply a steel-transshipment hub. Reuters cites a Center for Strategic and International Studies report suggesting some goods may undergo substantial processing in Mexico before export, rather than merely passing through with a new label.

Actual manufacturing is not a costume change. A registry entry, however, is not manufacturing at all.

Gutierrez says Mexico is prioritizing relief from the sectoral tariffs and hopes for positive news before year-end. The report announces no tariff-relief deal.

For now, the sales pitch is improved traceability, fewer questionable entries and a request that Washington notice the work.

First the factory has to exist. Then the steel has to qualify. Then the tariff relief has to materialize. The paperwork is making excellent progress toward eventually encountering an object.