9902.12.56 - Camera cases designed to contain cameras of subheading 8525.80.40; such cases of opaque molded polycarbonate plastics in a solid color and with nonreflective surface; each incorporating buttons for the operation of the camera, a plastic clip attached to a base mount, a thumb-screw on the base mount designed to facilitate the adjustment of its viewing angle on a pivot, a silicon gasket in the door of the housing designed to allow for waterproof operation of the camera at a depth of more than 40 m but not more than 60 m; each incorporating a flat, optically-coated glass lens and a heat sink to dissipate camera heat (provided for in subheading 4202.99.90).

This HTS category, 9902.12.56, specifically covers specialized camera cases designed for containing cameras classified under subheading 8525.80.40. These cases are distinguished by their construction from opaque, molded polycarbonate plastics, presented in a solid color with a nonreflective surface. Key functional features include integrated buttons for camera operation, a plastic clip attached to a base mount, a thumb-screw for adjusting the viewing angle on a pivot, and a silicon gasket in the door to ensure waterproof operation to depths between 40 and 60 meters. Furthermore, each case incorporates a flat, optically-coated glass lens and a heat sink to manage camera heat.

As this is a specialized provision within Chapter 99, it does not have direct siblings in the traditional sense of broadly defined product categories. Instead, its purpose is to provide a temporary modification or a specific classification for goods that might otherwise fall under a more general tariff heading, such as subheading 4202.99.90, which covers other types of bags and cases. The detailed specifications of materials, functionality, and waterproofing depth are crucial for differentiating these cases from more generic camera accessories.

Given that 9902.12.56 is a leaf node within the HTS database, there are no further subcategories. Classification into this heading is solely dependent on meeting all the explicit requirements detailed in its description, ensuring that only these precisely defined camera cases are covered.