How Importers in Thailand Can Win Customs Assessments: The WCO's Explanatory Notes

March 5, 2025

How Importers in Thailand Can Win Customs Assessments: The WCO’s Explanatory Notes

It is a common misconception that importers will never win classification assessments by the Thai Customs Department. However, this belief is far from the truth. Importers can indeed prevail in customs assessments, and one of the most effective tools at their disposal is the World Customs Organization’s (WCO) Explanatory Notes.

The WCO’s Explanatory Notes are an indispensable resource for understanding the Harmonized System (HS) of tariff nomenclature. These notes provide detailed commentary on the scope of each heading, including lists of main products included and excluded, technical descriptions, and practical guidance for identifying goods. By leveraging these notes, importers can ensure accurate classification of their goods, which is crucial for fair customs assessments.

Understanding the Explanatory Notes

The Explanatory Notes serve as the official interpretation of the Harmonized System at the international level. They offer clarity on the classification of goods, which can significantly impact the duties and taxes imposed on imports. For instance, the notes provide insights into the properties, methods of production, and uses of various goods, helping importers to classify their products correctly and avoid misclassification disputes.

Thailand’s Customs Tariff Decree holds that the classification interpretation must follow the General Rules for Interpretation together with the Explanatory Notes to the Harmonized System of the WCO. Most Thai Supreme Court decisions on classification also refer to the WCO’s Explanatory Notes and past rulings as the basis of their decisions.

Successful Appeals

There have been numerous instances of importers successfully appealing customs assessments by relying on the Explanatory Notes. For example, one importer of electronic components was initially assessed a higher duty due to misclassification. By presenting evidence from the Explanatory Notes that accurately described the components, the importer was able to demonstrate the correct classification and secure a favorable reassessment.

Practical Steps for Importers

To minimize the risk of misclassification in customs assessments, importers should:

Familiarize themselves with the notes: Importers should thoroughly understand the relevant sections of the Explanatory Notes that pertain to their goods.
Document and present evidence: When disputing a customs assessment, importers should provide detailed documentation and reference the specific sections of the Explanatory Notes that support their case.
Request an advance ruling on classification: This process allows importers or exporters to submit a request to the Customs Department for a ruling on the tariff classification of goods to be imported or exported in advance.
Seek expert advice: Consulting with customs brokers or legal experts who are well-versed in the Explanatory Notes can provide additional support and increase the chances of a successful appeal.

Conclusion

The notion that importers will never win customs assessments is a myth. By relying on the WCO’s Explanatory Notes, importers may be able to challenge and overturn unfair assessments. The key lies in understanding and utilizing these notes to ensure accurate classification and fair treatment in customs processes. Importers should not be discouraged by initial assessments but should instead leverage all available resources to advocate for their rights.

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Chitchai Punsan

Thailand

+66 2056 5779

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