Goods that frequently land here include precious-metal electrical contacts and connectors (when not more specifically classified as electrical components), decorative precious-metal inlays or fittings for furniture or instruments, and certain laboratory or industrial apparatus parts made of gold or platinum that do not meet the specific form requirements of the catalyst heading. The common thread is that each article must be made of or clad with precious metal and must not fit a more specific heading.

A binding ruling is advisable whenever the article's function or form could plausibly fit multiple headings — for example, a gold-clad component that could be either a jewelry part or an industrial fitting. Given the high per-unit value typical of precious-metal goods, a classification error can result in significant duty underpayment liability or overpayment. CBP ruling requests are filed through the CBP online ruling portal and typically receive a response within 30 days.