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As of May 25, 2026, no aluminum product on the regulated list clears Mexican customs without an Aviso Automático de Importación number declared on the pedimento. Six weeks earlier, that requirement did not exist. If your operation imports anything in chapter 76 and no one has confirmed the new aviso is being filed, you are already exposed — not preparing for a change, operating under one.
This is the kind of regulatory shift that does not announce itself with a grace period. The aviso for aluminum moved from "published" to "mandatory at the pedimento" in under two months, and the data it demands is not data most importers had ready. Here is exactly what changed, the dates that define your exposure, and the four things to verify before your next aluminum shipment reaches the border.
What the new requirement is
The Secretaría de Economía added Regla 2.2.26 BIS to its rules and criteria for comercio exterior, creating an Aviso Automático de Importación for products of aluminum. It applies to 42 fracciones arancelarias of chapter 76 of the TIGIE — ingots, profiles, sheet, tube, alloys, and fabricated aluminum parts. Mechanically, it works like the steel aviso that has existed since 2022: it is a regulación y restricción no arancelaria, a monitoring instrument filed through VUCEM before the goods clear. The aviso number then has to appear on the pedimento, and without it the merchandise does not move.
What makes the aluminum version distinct is the information it requires. Beyond the standard fracción, description, quantity, and value, the aviso demands origin-traceability data: the country where the metal was smelted, where it was cast, and where it was transformed. That is the requirement most operations were not set up to answer.
The dates that define your exposure
The timeline is short, and each date carries a different consequence.
The acuerdo adding Regla 2.2.26 BIS was published in the Diario Oficial de la Federación on April 2, 2026 — but publication alone did not make it operative. The rule explicitly conditioned its application on two things happening first: the trámite being enabled in VUCEM, and the corresponding aviso being published on the SNICE portal. Until both occurred, the obligation was not enforceable. That is why a company reading only the April DOF notice might have concluded, reasonably, that there was nothing to do yet.
Then both conditions landed in quick succession. The VUCEM application went live on May 18, 2026, and the obligation to declare the aviso number on the pedimento became enforceable on May 25, 2026. The window between "you can now file" and "you must now file" was one week. On April 3, an aluminum importer could clear a shipment with the documentation they had always used. By May 25, the same shipment, the same supplier, the same fracción, would not clear without a data point — the smelting country — that may never have appeared on a single one of their invoices. That compression is the whole story.
The trap most operations have not closed
The smelting, casting, and transformation country is not information you generate at your desk. It originates with your supplier, often several tiers upstream from the company that sold you the finished part. If your purchase order says "aluminum profile, origin Germany," that tells you where it shipped from or where it was last substantially transformed — not necessarily where the underlying metal was smelted, which is the data the aviso now wants.
This is why the requirement bites at clearance rather than at filing. A team assembles what it has, enters VUCEM, and discovers the smelting-country field cannot be left blank or guessed. Sourcing it then — with a vessel discharged and a bonded clock running — is the expensive way to learn that origin data has to be negotiated into the supply relationship, not reconstructed at the border.
📋 Quick check: Pull every open and incoming purchase order for chapter 76 aluminum. For each, confirm you can state — from a document, not an assumption — the country where the metal was smelted and cast. Any line where you cannot is a clearance delay waiting to happen.
What to check this week
Four verifications, in order of urgency.
First, confirm the aviso is actually being filed on your aluminum operations right now. Do not assume it is because a broker is involved. Ask for the aviso number on a recent post-May-25 pedimento and look at it.
Second, audit your chapter 76 fracción list against the 42 covered fracciones. Knowing which of your products are in scope tells you where the new data burden falls — and confirms whether anything you import sits just outside it.
Third, close the origin-data gap at the source. For every covered supplier, get the smelting, casting, and transformation country in writing, and build it into your standard supplier documentation so it arrives with the shipment rather than being chased after it.
Fourth, check consistency before filing, not after. The data on the aviso has to align with the commercial invoice and the rest of the operation; an inconsistency between technical, commercial, and origin data can get the aviso rejected and stall the clearance you were trying to protect.
The aluminum aviso is not a heavier version of paperwork you already do. It changes what your daily import routine has to know before a shipment leaves the supplier — and the operations that adjust their sourcing documentation now are the ones that will stop noticing it by July. The rest will keep meeting it at the border, one held container at a time.
TRADE. UNDER CONTROL.
