About The Webinar

Take your tariff classification skills to the next level in the second of this four-part webinar series covering advanced classification topics.  In this second session, the focus is on GRI 3(a) (relative specificity) and US ARI 1(a) (principal use).

The first session takes a deep dive into GRI 1 to interpret and apply the tariff terms and notes. The third session covers classifying combinations of all kinds.  The fourth section focuses on duty exemptions by classification.  

See all four sessions here.

Contact if you have issues registering. Please note we do not take American Express.

Key Topics

  • GRI 3(a) Rule of Relative Specificity
  • Classifying the Headings: Eo nomine, Principal Use, Actual Use, and Constituent Material
  • Applying the Carborundum factors to determine principal use (real life examples!)


Please note we do not accept payment via American Express.


Deborah B. Stern


Deborah Stern is a Member in the Import and Export Practice Group of Sandler, Travis & Rosenberg, P.A., resident in the Miami office. A former senior attorney with U.S. Customs and Border Protection, Ms. Stern advises domestic and multinational clients on both U.S. and foreign customs compliance and other trade matters. She concentrates her practice in traditional customs areas such as tariff classification, seizures and penalties, country of origin marking, valuation, trademark infringement, government procurement, trade preference programs, and free trade agreements, as well as the World Customs Organization’s Harmonized System. With special emphasis in the high-tech sector, she has substantial experience in almost every product area of the tariff schedule.



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