The basic rule of tariff classification under the Harmonized Tariff Schedules (HTS) is that each article imported must be separately and individually classified at the time of entry. There are, of course, exceptions to this rule. For example, if you have machinery that consists of combination of machines or apparatuses intended to contribute together to a clearly defined function covered by one of the headings in chapters 84, 85 or 90, then the whole is to be classified in th