If the article is an antenna, antenna reflector, or a part specifically designed for an antenna assembly, it classifies under 852910. All other parts for radio transmission, radar, radio navigation, and television apparatus that are not antennas fall under 852990. The key is whether the part's principal function is reception or radiation of electromagnetic signals as an antenna element.

Many tariff lines within 8529 that originate from China are subject to Section 301 measures. The measure applies at the specific 10-digit HTS line level, so importers should verify each line's status and the declared country of origin before entry.