On 21 January 2026, a Nantes-based importer of connected air quality measuring devices receives a communication of grounds. For three years, it has been declaring its sensors under a heading at 1.7%. The investigation unit considers them to be data transmission apparatus falling under a heading at 3.7%, and puts the difference at 212,000 euros. The managing director had considered applying for Binding Tariff Information (BTI) in 2023, then decided against it: the procedure seemed lengthy to him, and his customs broker was sure of its classification.
Should he have applied? Not necessarily. That is the whole difficulty with BTI, which companies readily present as insurance but which is in fact a reciprocal commitment. This page explains what BTI protects and what it does not, how to apply for it, when it ceases to have effect, and how to challenge a classification once the disagreement with the administration has already arisen.
1. What Binding Tariff Information protects
The customs authorities take, upon application, decisions relating to Binding Tariff Information (Art. 33(1) of the Union Customs Code (Regulation (EU) No 952/2013)). The decision concerns only the tariff classification of the goods it describes. It is valid for three years from the date on which it takes effect (Art. 33(3)). Its effect is twofold. Many operators are unaware of this.
First, it binds the administration, as regards the holder, in respect of goods for which customs formalities are completed after the decision takes effect (Art. 33(2)(a)). The protection is concrete: the Code provides that no debt is notified where the amount of duty payable would exceed the amount determined on the basis of a BTI decision (Art. 102(1)(b)). An importer holding BTI that declares in accordance with it therefore cannot be asked retroactively to pay the difference if the administration changes its mind.
It also binds the holder, as regards the administration, from the date on which the holder receives or is deemed to have received notification of the decision (Art. 33(2)(b)). If the BTI adopts the more heavily taxed heading, the company can no longer declare under the heading it considers correct. It must apply the decision, challenge it or stop importing the goods in that form.
Finally, the holder must state the BTI reference number in its customs declarations (Art. 20 of Implementing Regulation (EU) 2015/2447). And by filing its application, it accepts the public disclosure, on the Commission’s website, of all the data in the decision, including photographs and brochures, with the exception of confidential information (Art. 19(2) of Delegated Regulation (EU) 2015/2446). Anything confidential must therefore be flagged as such in the application.
2. Applying for BTI: the application shapes the decision
The application is submitted to the customs authority of the Member State where the applicant is established or of the State where the information is to be used (Art. 19(1) of Delegated Regulation 2015/2446). Where it is filed in a State other than the State of establishment, the authority concerned informs the authority of the State of establishment within seven days (Art. 16 of Implementing Regulation 2015/2447). The decision is taken within one hundred and twenty days of acceptance of the application (Art. 22(3) of the Code), a period that may be extended, in particular where the Commission has suspended the adoption of decisions to ensure uniform classification, up to a limit of ten months, or five months more in exceptional circumstances (Art. 20 of the Delegated Regulation).
An application will not be accepted if the applicant already holds a decision for the same goods (Art. 33(1)(a)). It is therefore not possible to keep applying until the desired answer is obtained. One chance per product. It must be prepared.
The quality of the application determines everything, and not only because a decision based on inaccurate or incomplete information supplied by the applicant is annulled (Art. 34(4)), which would retroactively remove the protection sought: it is also because the department examining the application classifies what is described to it, not the product as the company knows it, so that a cursory technical data sheet, a flattering commercial description or a poorly chosen photograph can steer the classification towards a heading the company would never have adopted had it been asked. The application must describe the composition, operation, principal function and presentation on import, and propose a reasoned classification in the light of the general interpretative rules, the section and chapter notes and the explanatory notes.
3. The limits of BTI: identity, rigidity, irrevocability
BTI protects only the goods it describes. To benefit from it, the holder must be able to prove that the goods declared correspond in every respect to those described in the decision (Art. 33(4)(a)). A change of sensor, embedded software, packaging or power supply is enough to take the product outside the scope of the decision. Product ranges evolve faster than BTI decisions, and this is something that technical departments, which change a component for reasons of cost or supply without suspecting that they are taking the product outside the scope of a decision obtained two years earlier, generally discover at the time of an inspection, when the administration compares the technical data sheet of the declared product with the description in the BTI and finds that they no longer match. This must be anticipated.
Rigidity, next. BTI cannot be amended (Art. 34(6)). If it is no longer suitable, a new one must be applied for in respect of the modified product, or one must wait until it ceases to be valid. Nor is it revoked at the holder’s request (Art. 34(5)). A company that regrets having obtained an unfavourable BTI cannot get rid of it by handing it back.
These three characteristics lead to a position we defend without reservation. BTI is not a formality to be applied for systematically for reassurance. It is useful where the classification is genuinely uncertain, the financial stakes justify it and the company is prepared to live with an unfavourable answer. Where the classification adopted is favourable and soundly defensible, applying for BTI amounts to offering the administration the opportunity to fix, for three years and for the future, a more heavily taxed reading. In that case, it is better to document the classification internally. And to be ready.
4. When BTI ceases to protect
BTI ceases to be valid before the end of its term where it no longer conforms to the law following an amendment to the Union tariff nomenclatures or the adoption by the Commission of classification measures, with effect from the date of application of those amendments or measures (Art. 34(1)). The customs authorities also revoke it where it has become incompatible with the interpretation of the nomenclature resulting from explanatory notes, a judgment of the Court of Justice or classification decisions and opinions of the World Customs Organization, each taking effect from a specified publication date (Art. 34(7)). Loss of validity has no retroactive effect (Art. 34(3)).
The holder is not always without recourse. Where BTI ceases to be valid as a result of classification measures, or is revoked, it may still be used for binding contracts concluded on its basis before it ceased to be valid or was revoked, for a maximum of six months (Art. 34(9)). This extended use is not available where loss of validity results from a mere amendment to the nomenclature (Art. 34(1)(a)), and a classification measure may exclude or shorten it. Where the authorities grant it, they set the expiry date and the quantities that may be cleared during that period (Art. 22 of Implementing Regulation 2015/2447). An importer with orders in progress must therefore keep the contracts and claim the benefit without delay.
Monitoring is therefore essential, and it must be organised. Classification regulations, explanatory notes and judgments of the Court of Justice are published in the Official Journal of the European Union, and it is that publication which triggers the end of protection. A company that learns of it during an inspection two years later discovers that it had long been declaring under a BTI that no longer covered it.
5. Challenging a classification: unfavourable BTI or reassessment
Two situations. In the first, the company has obtained a BTI adopting a classification it disputes. The decision must state reasons and refer to the right of appeal (Art. 22(7) of the Code), which is exercised under the conditions of Article 44. The appeal does not have suspensive effect, unless the administration has good reason to believe that the decision is inconsistent with customs legislation or fears irreparable damage to the person concerned, and suspension may then be made conditional on a guarantee (Art. 45). During the proceedings, the BTI therefore continues to bind its holder. That is uncomfortable.
In the second situation, the most common one, the administration challenges the classification adopted in the declarations, without any BTI existing. The disagreement goes through the adversarial exchange, then through the challenge to the notice of assessment (avis de mise en recouvrement, AMR) before the authority that issued it (Art. L. 331-1 of the Customs Code) and, where appropriate, before the judicial court (tribunal judiciaire), which has jurisdiction over disputes concerning claims recovered by the customs administration (Art. L. 332-1 and L. 332-2). This is the Nantes case.
On the merits, classification is argued according to a method the court applies rigorously. The general interpretative rules of the nomenclature apply in order, the wording of the headings and the section and chapter notes take precedence, and the decisive criterion is, as a rule, the objective characteristics and properties of the goods as they can be ascertained at the time of customs clearance. The Cour de cassation reiterated this in a published judgment of 18 September 2024 (Cass. com., no. 21-24.571), holding in passing that general rule 5(b), on packing materials, is mandatory.
A rule of conduct, then. Arguments based on commercial usage, the description on the invoice, the classification adopted by a competitor or by another Member State, or the end user’s intention carry little weight against a rigorous analysis of the product’s objective characteristics in the light of the notes. They supplement a demonstration. They never replace it. Where the interpretation of the nomenclature is genuinely uncertain, the national court may refer a question to the Court of Justice for a preliminary ruling, and it is sometimes in the company’s interest to suggest this.
6. Organising the classification of your products
Classification is not a matter for the customs broker alone. It is a legal decision, taken product by product, whose financial consequences and, in the event of inaccuracy, penal consequences are borne by the company. The company must be able to account for it: a classification sheet for each product, dated, stating the heading adopted, the reasoning followed in the light of the general interpretative rules, the sources consulted and the person who approved it.
This discipline serves at least three purposes. It makes it possible to decide with full knowledge whether to apply for BTI, for only those products whose classification is genuinely uncertain. It makes it easier to respond in the adversarial exchange, since the reasoning already exists. And it demonstrates, where necessary, the company’s diligence, which counts for settlement and for any application for remission.
For the Nantes importer, it is too late for a BTI that would have covered the past. It remains to show, with technical documents, that the measuring function prevails over the transmission function, and to follow the method of the general interpretative rules rather than relying on its customs broker’s opinion. If it wins, it can then consider BTI to secure the future. If it loses, the questions of limitation and possible remission will arise.
The firm assists companies in preparing BTI applications, challenging classification decisions and conducting tariff litigation before the judicial court. Hervé Guyader is co-author of the Guide Lamy des procédures douanières, whose update following the recodification of 1 May 2026 is under way. For an overview of all our work, see our page customs lawyer in Paris; for a current matter, contact the firm, with a reply within 24 business hours.
On the same path: responding to the adversarial exchange within thirty days; repayment and remission of customs duties; limitation of the customs debt; Authorised Economic Operator status.
This analysis is part of the firm’s work in international trade law.
Frequently asked questions
How long is BTI valid?
Three years from the date on which it takes effect (Art. 33(3) of the Union Customs Code). It may cease to be valid earlier in the event of an amendment to the nomenclature or a classification measure, and may be revoked if it becomes incompatible with explanatory notes, a judgment of the Court of Justice or an opinion of the World Customs Organization (Art. 34).
Am I bound by an unfavourable BTI?
Yes. BTI binds its holder from receipt of notification (Art. 33(2)(b)). It cannot be amended and is not revoked at the holder’s request (Art. 34(5) and (6)). You may challenge it by way of the appeal provided for in Article 44 of the Code, which in principle does not have suspensive effect (Art. 45).
Can customs claim duties from me if I hold BTI?
Not beyond what the BTI sets for the goods it covers: the Code excludes notification of a debt exceeding the amount determined on the basis of the decision (Art. 102(1)(b)). It must still be proved that the goods declared correspond in every respect to those described (Art. 33(4)) and that the BTI was still valid.
What happens to my orders in progress if my BTI is revoked?
The BTI may still be used, for a maximum of six months, for binding contracts concluded on its basis before revocation (Art. 34(9)). The authorities then set the deadline and the quantities allowed (Art. 22 of Implementing Regulation 2015/2447). This extended use is not available in the case of a mere amendment to the nomenclature.
How can a tariff classification adopted by customs be challenged?
During the adversarial exchange, then by challenging the notice of assessment and, where appropriate, before the judicial court (Art. L. 331-1 and L. 332-2 of the Customs Code). On the merits, the court applies the general interpretative rules in order and relies on the objective characteristics of the product (Cass. com., 18 September 2024, no. 21-24.571).
References: Union Customs Code (Regulation (EU) No 952/2013 of 9 October 2013), Art. 22(3) and (7), Art. 33, 34, 44, 45, Art. 102(1)(b); Delegated Regulation (EU) 2015/2446 of 28 July 2015, Art. 19 and 20; Implementing Regulation (EU) 2015/2447 of 24 November 2015, Art. 16, 20 and 22; Customs Code, Art. L. 331-1, L. 332-1, L. 332-2, in force since 1 May 2026 (Ordinance No. 2026-265 of 8 April 2026); Cass. com., 18 September 2024, no. 21-24.571, published in the Bulletin; Doctrine: Guide Lamy des procédures douanières, Wolters Kluwer, co-authored by Hervé Guyader (update in progress).