Paying the duties on an import isn’t enough to get the goods in. Some products, on top of the tariff, need sign-off from an agency that isn’t customs: health, environment or defense.
In Mexico these are called non-tariff regulations and restrictions — RRNA on the customs entry — and they have one uncomfortable trait: they can’t be worked out at clearance. If the tariff code requires a permit and the permit isn’t there, the cargo isn’t released. It doesn’t matter that the entry is flawless and the duties are paid.
The three that catch first-time importers off guard most often are COFEPRIS, SEMARNAT and SEDENA.
What a non-tariff regulation is, in one sentence
It’s a requirement that isn’t a tax but conditions whether goods can enter or leave: a permit, a notice, a certificate, compliance with a standard, a quota.
Customs doesn’t grant it — customs checks it. The issuing body is the agency that regulates that kind of product, and each one publishes its own agreement in Mexico’s Official Gazette (DOF) listing the tariff codes it controls.
That’s why a single shipment can need, at once, an import permit from the Ministry of Economy, a NOM standard and a health authorization. None of them replaces the others.
COFEPRIS: anything that touches health
The Federal Commission for Protection against Health Risks regulates whatever can affect the health of the people who consume, use or handle it. Typical categories:
- Pharmaceuticals and their raw materials.
- Medical devices, from instruments and equipment to clinical supplies.
- Cosmetics and personal-care products.
- Food, beverages and supplements, including ingredients and additives.
- Toxic or hazardous substances, pesticides and plant nutrients.
- Tobacco products and other health-risk goods.
The instrument depends on the product: some goods need a prior sanitary import permit, others only a notice. Some also require the product to hold a valid sanitary registration in Mexico — a separate, longer process than the permit itself.
The most confusing part: the same kind of product may or may not be regulated depending on its tariff code and declared use. An input entering as an industrial raw material doesn’t always follow the same path as the same input meant for human consumption.
SEMARNAT: anything that touches the environment
The Ministry of Environment and Natural Resources regulates what can harm the environment or what comes from it. Example categories:
- Waste, especially hazardous waste, and materials imported for recycling or reprocessing.
- Wild flora and fauna, their parts and derivatives — including species protected by international conventions.
- Ozone-depleting substances and certain refrigerants and gases.
- Timber and forest products, along with their treatment and packaging.
- Chemicals with environmental impact.
Wood deserves its own mention because it shows up where nobody looks: in the packaging. Wooden pallets, crates and dunnage have their own treatment and marking rules even when what’s inside is machinery. Packaging without the right treatment can hold up a shipment that was otherwise fully compliant.
SEDENA: anything that touches security
The Ministry of National Defense controls what could be used for military purposes or to harm others. The obvious categories:
- Firearms, their parts, accessories and ammunition.
- Explosives and pyrotechnics.
- Chemicals used to make explosives or with dual use: legitimate in industry, dangerous in the wrong hands.
And the less obvious ones: equipment and components nobody associates with the military — certain drones or drone parts, for example, depending on their specifications — can fall within SEDENA’s scope. That’s exactly the category that surprises people, because the importer is thinking of a consumer product or industrial equipment, not a defense permit.
These lists are examples, not closed catalogs. What decides is not the product’s trade name but its tariff code, and each agency’s agreement gets amended. Something unregulated last year may be regulated today.
How to tell whether your tariff code requires it
Order matters:
- Classify correctly. Everything starts with the tariff classification. With the wrong code, every check after that gives you the wrong answer.
- Look the code up in the tariff. The LIGIE and SNICE show which regulations apply to each code. Our import duty calculator displays those non-tariff flags next to the duty estimate, and each one links to its official source.
- Read each agency’s current agreement. The flag tells you there’s something to check; the agreement tells you exactly what, with its qualifiers and exceptions. Always check the version currently in force in the DOF, not a saved copy.
- Read the qualifiers. Many codes are regulated only for certain uses, presentations or compositions. The difference between “permit required” and “not required” is sometimes a single line.
- Factor in the customs regime. The same product can carry different requirements under a definitive import, a temporary import or a program like IMMEX.
One more caveat: some of these goods, besides the permit, can only be cleared through designated customs ports or require enrollment in the sector-specific importer registry. These requirements stack; they don’t replace each other.
When to apply: before the cargo arrives
The rule is simple: the permit has to exist when the customs entry is filed, and its identifier is declared on it. It’s not something you sort out at the port.
In practice, it pays to start even earlier — before you close the purchase:
- Many permits are filed through VUCEM, Mexico’s single trade window, but they ask for information the supplier holds: technical sheets, safety data sheets, composition, certificates of analysis, registrations in the country of origin. Getting it once the cargo is already in Mexico is slow.
- The agency may raise observations or ask for more information. Every round takes time.
- Permits carry a holder, validity period, authorized quantities and tariff codes. If the invoice doesn’t match what was authorized, the permit doesn’t cover the shipment.
Response times vary by agency and by procedure; check the current procedure sheet rather than assuming. What doesn’t vary: applying after the goods ship is betting that the answer arrives before the vessel does.
What happens if it arrives without a permit
If the goods arrive and the permit is missing — or doesn’t match what’s being presented — the typical scenario looks like this:
- The cargo is held. It can’t be cleared while the requirement is missing. Meanwhile storage, demurrage and detention keep running.
- If the gap is caught during inspection, it can escalate into a PAMA with precautionary seizure: the goods stay in the authority’s hands while the proceeding is resolved, with fines involved.
- In some cases the situation can’t be regularized and the goods must be returned abroad or, for health or environmental regulations, may end up destroyed.
If you’re already there, our guide to goods held at Mexican customs helps you pin down the cause and the first steps.
A family resemblance worth knowing
COFEPRIS, SEMARNAT and SEDENA aren’t the only ones. Economy has its prior permits, automatic notices and import quotas; Agriculture has its plant and animal health requirements; the NOM standards have their own annex. The logic is the same every time: the tariff code rules, the current agreement defines, and the requirement must be settled before clearance.
Checklist before you buy
- Tariff code validated by a specialist.
- Non-tariff flags reviewed for that code.
- Each agency’s current agreement checked, qualifiers included.
- Technical information requested from the supplier before the purchase order goes out.
- Permit obtained, with holder, validity and quantities matching the invoice.
- Wood packaging checked, even if the product itself isn’t wood.
- Port of entry and sector registry confirmed, where they apply.
At TradeWay
We review the regulations on your tariff code before you close the purchase, tell you which permits apply and what to ask your supplier for, and coordinate the rest of the operation — freight, clearance, trucking and warehousing — through one point of contact and one invoice. If you have a new product and aren’t sure whether it needs COFEPRIS, SEMARNAT or SEDENA, get in touch before it ships.
