Multi-function home gym units are generally classified as a whole based on their principal function or, where no single function predominates, under the heading that appears last in numerical order among those that could apply. Importers should document the machine's primary marketed use and consult a customs broker when a unit integrates features that could point to multiple headings.

The tariff classification and applicable duty rate are determined by the article's physical characteristics, not its end-use destination (commercial gym versus home use). However, if the equipment meets the specifications of a different HTS heading — for example, professional-grade apparatus with distinct construction standards — that heading's rate would apply. End-use certificates do not alter classification under the standard tariff schedule.