We all know intuitively what a part is. Nearly every company has a parts department. These are the areas of the company staffed by those magical people who never throw anything away and always seem to be able to find that one widget or what is needed to repair a product and satisfy a customer.
It comes as a surprise to some that the Harmonized Tariff Schedule (HTS) uses the word part with a much narrower and precise definition. What we call a part in industry is rarely what the HTS code refers to as a “part” or “parts thereof.” As examples, it is not uncommon to find headings in the tariff such as: