What is Chapter Notes?

Chapter notes are legal provisions at the beginning of each chapter of the Harmonized Tariff Schedule that define the scope of that chapter, exclude certain products, and establish classification rules. They are binding — if a chapter note says 'this chapter does not cover X,' then X cannot be classified in that chapter regardless of the headings' descriptions. Section notes apply to groups of chapters. Subheading notes refine classification at the 6-digit level. Together with the General Rules of Interpretation, chapter notes form the legal framework for product classification.

Correct classification directly affects refund amounts. If goods were misclassified at entry — perhaps placed under an HTS code with a higher rate than the chapter notes support — the corrected classification may change the eligible refund amount. Tariffi's analysis flags entries where classification appears inconsistent with chapter note guidance.