The Harmonized Tariff Schedule of the United States (HTSUS) is the primary resource for determining tariff classifications for goods imported into the United States. Content is housed in the HTSUS database and functions as a Finder tool or HTSUS look-up table that resides inside a Checkpoint document that includes specific look-up features and functionality. The look-up tool allows users to make classification decisions about the products they are importing/exporting.
In the HTSUS, goods are logically arranged so they appear in headings beginning with the most basic substances, and ending with more advanced manufactured goods. This progression is found within the chapters and the sections.
Following is an example of a Checkpoint Table of Contents search of Chapter 1 of the HTSUS:
If you open Chapter 1, for example, notice how the headings are displayed in large gray columns:
Circled above are two top line links: Section Notes and Chapter Notes. From these links, you can obtain more specific information about the section and chapter content. All headings and subheadings for HTSUS chapters in Checkpoint will expand and collapse to allow for easy comparison of text at the same level.
Note: With one click of the Expand All feature (red arrow above), you can open all of the subtopics for each of the listed items.
In the following example, clicking the 
icon (Related Rulings) provides a listing in the left pane of related custom rulings.
Clicking the 
Explanatory Notes (WCO) icon links to a preview window with Explanatory Notes for the associated heading. The 
triangle icon links to a preview window with alert information from the ABI database. The 
icon shows the hierarchy of the heading next to it.