Generally, both baled and granulated polyethylene scrap classify under 3915100000 as long as the material remains waste or scrap rather than a reprocessed primary form. However, if the material has been cleaned, sorted, and pelletized to a specification that makes it functionally equivalent to a primary-form polymer, CBP may reclassify it under Chapter 39 headings covering polymers of ethylene in primary forms. Importers should retain processing records and specifications to support the correct classification.

The Basel Convention's 2019 amendments tightened controls on transboundary movements of contaminated or mixed plastic waste. While the US has not ratified the Basel Convention, exporting countries may require prior informed consent or export permits for certain plastic waste streams. Importers sourcing from countries that have implemented these controls should confirm that the exporter has obtained any required authorizations before shipment to avoid delays or rejection at the US port of entry.