2517.20.00.00 - Macadam of slag, dross or similar industrial waste, whether or not incorporating the materials cited in subheading 2517.10

HTS Code 2517.20.00.00 specifically classifies macadam derived from slag, dross, or similar industrial waste. This category encompasses materials that have undergone processing from the byproducts of industrial activities, often metallurgy. The key characteristic is the origin of the material as waste from industrial processes, which is then prepared for use as aggregate. It is important to note that this classification can include such industrial waste macadam even if it incorporates materials mentioned in subheading 2517.10, provided the primary component remains the industrial waste.

This classification is distinct from its sibling, 2517.10.00, which covers natural pebbles, gravel, and broken or crushed stone primarily used for construction aggregates, road building, or railway ballast. Unlike 2517.10.00, which deals with naturally occurring stone materials, 2517.20.00.00 focuses on materials that are products of industrial waste. Furthermore, it differs from 2517.30.00.00 (Tarred macadam), which specifically involves the treatment of macadam with tar or bituminous substances for road surfacing.

As this is a leaf node within the HTS structure, there are no further subcategories to introduce. Therefore, classification under 2517.20.00.00 relies on identifying the material as originating from industrial slag, dross, or similar waste, and its preparation for use as aggregate material. Practical classification will often involve examining the source of the material and its physical form, ensuring it meets the criteria of being processed industrial waste rather than natural stone or tarred products.