9902.15.89 - Optical telescope mirror segment support assemblies, each presented without mirrors (provided for in subheading 8479.89.94)

This HTS category, 9902.15.89, specifically addresses optical telescope mirror segment support assemblies. These are components designed to hold and align segments of a mirror used in optical telescopes. Crucially, these assemblies are presented *without* the mirrors themselves. The classification acknowledges that the mirrors, when imported separately, would likely fall under subheading 8479.89.94.

This classification is part of Chapter 99, which encompasses temporary legislation and modifications related to trade agreements and agricultural adjustments. Its placement here signifies a specific, potentially time-limited, tariff treatment or restriction distinct from the permanent HTS classifications found in earlier chapters that cover the basic enumeration of goods.

As a leaf node within Chapter 99, this category does not have further subdivisions. Its specificity means that only those optical telescope mirror segment support assemblies that meet the precise description and are subject to the provisions within Chapter 99 will be classified here. Importers must ensure that these components are indeed intended for use in optical telescopes and are presented without their corresponding mirrors to correctly utilize this code.