8531.90.15.00 - Of the panels of subheading 8531.20

This category, HTS 8531.90.15.00, specifically covers parts and components that are printed circuit assemblies (PCAs) for electric sound or visual signaling apparatus falling under subheading 8531.20. Subheading 8531.20 pertains to indicator panels and similar visual signaling apparatus. Therefore, this classification applies to the electronic boards containing integrated circuits, resistors, capacitors, and other electronic components, which are designed to function within the indicator panels mentioned.

This classification distinguishes itself from its sibling, 8531.90.30.00 (Other parts), by its precise nature as a printed circuit assembly. While 8531.90.30.00 would encompass other components of signaling apparatus not meeting the criteria for PCAs, this sub-heading is strictly for the assembled electronic circuitry. The PCA must be specifically designed for or identifiable as a component part of the indicator panels classified under 8531.20.

As this is a leaf node, there are no further subcategories. The classification is finalized at this point, identifying these specific electronic components. Therefore, the focus remains on clearly defining what constitutes a printed circuit assembly for indicator panels, ensuring accurate identification and separation from other parts or components of signaling apparatus.