3915.90.00.90 - Other

This HTS category, 3915.90.00.90, encompasses waste, parings, and scrap originating from plastics not specifically listed in preceding subheadings within heading 3915. This includes any residual plastic materials generated during manufacturing processes, such as offcuts, trimmings, or rejected items, that do not fall into categories defined by specific plastic types like polyethylene terephthalate (PET). The key criterion for inclusion here is the absence of a more specific classification based on the plastic's polymer composition.

Unlike its sibling category, 3915.90.00.10, which is exclusively for waste and scrap of polyethylene terephthalate (PET) plastics, this subheading serves as a residual category for all other plastic wastes. This means if the plastic waste is not identifiable as PET, it would likely fall under this "Other" classification, provided it meets the general definition of waste, parings, or scrap of plastics.

As this is a leaf node, there are no further subcategories. Therefore, classification within this heading relies on a thorough examination of the physical form and material composition of the plastic waste to ensure it does not qualify for a more specific heading or subheading within Chapter 39 or other relevant sections of the Harmonized Tariff Schedule.