Trainer · Orientation
Corpus map
Before you can look something up fast, you need a mental map of where things live. The corpus map lays out how the exam references are organized: the 22 Sections and 99 Chapters of the Harmonized Tariff Schedule (HTSUS), the structure of Title 19 of the Code of Federal Regulations (19 CFR) and the Parts a broker actually needs, for example Part 111 for broker licensing, Part 141 for entry, Part 152 for valuation, and Part 190 for drawback, and the CBP directives. Each node explains what it covers in plain words and links out to the official page. It is a navigation aid built from the public structure, not a copy of the corpus.
The interactive map is being built. The Citation Race drill is live now, and the glossary already defines the core parts and rules.